Home / 21,172,154.40-31,739,734.85-8,209,374.21

Finding the Fourth Proportional to 21,172,154.40, 31,739,734.85 and 8,209,374.21

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Solution

The fourth proportional to 21,172,154.40, 31,739,734.85 and 8,209,374.21 is: 12,306,889.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172,154.40 : 31,739,734.85 = 8,209,374.21 : x
  2. Step 2: Convert to fraction form
    21,172,154.40/31,739,734.85 = 8,209,374.21/x
  3. Step 3: Cross multiply
    21,172,154.40x = 31,739,734.85 × 8,209,374.21
  4. Step 4: Simplify right side
    21,172,154.40x = 260,563,360,668,781.34
  5. Step 5: Solve for x
    x = 260,563,360,668,781.34/21,172,154.40
  6. Step 6: Final answer
    x = 12,306,889.31

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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.