Home / 21,275,145,306.90-31,912,717,960.35-12,894,533,313.30

Finding the Fourth Proportional to 21,275,145,306.90, 31,912,717,960.35 and 12,894,533,313.30

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Solution

The fourth proportional to 21,275,145,306.90, 31,912,717,960.35 and 12,894,533,313.30 is: 19,341,799,969.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275,145,306.90 : 31,912,717,960.35 = 12,894,533,313.30 : x
  2. Step 2: Convert to fraction form
    21,275,145,306.90/31,912,717,960.35 = 12,894,533,313.30/x
  3. Step 3: Cross multiply
    21,275,145,306.90x = 31,912,717,960.35 × 12,894,533,313.30
  4. Step 4: Simplify right side
    21,275,145,306.90x = 411,499,604,857,680,232,448
  5. Step 5: Solve for x
    x = 411,499,604,857,680,232,448/21,275,145,306.90
  6. Step 6: Final answer
    x = 19,341,799,969.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.