Home / 15,720.71-21,705.68-10,426.55

Finding the Fourth Proportional to 15,720.71, 21,705.68 and 10,426.55

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Solution

The fourth proportional to 15,720.71, 21,705.68 and 10,426.55 is: 14,396.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.71 : 21,705.68 = 10,426.55 : x
  2. Step 2: Convert to fraction form
    15,720.71/21,705.68 = 10,426.55/x
  3. Step 3: Cross multiply
    15,720.71x = 21,705.68 × 10,426.55
  4. Step 4: Simplify right side
    15,720.71x = 226,315,275.34
  5. Step 5: Solve for x
    x = 226,315,275.34/15,720.71
  6. Step 6: Final answer
    x = 14,396.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.