Home / 21,158.61-31,756.95-11,306.31

Finding the Fourth Proportional to 21,158.61, 31,756.95 and 11,306.31

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Solution

The fourth proportional to 21,158.61, 31,756.95 and 11,306.31 is: 16,969.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.61 : 31,756.95 = 11,306.31 : x
  2. Step 2: Convert to fraction form
    21,158.61/31,756.95 = 11,306.31/x
  3. Step 3: Cross multiply
    21,158.61x = 31,756.95 × 11,306.31
  4. Step 4: Simplify right side
    21,158.61x = 359,053,921.35
  5. Step 5: Solve for x
    x = 359,053,921.35/21,158.61
  6. Step 6: Final answer
    x = 16,969.64

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1.5x scale

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.