Home / 15,736.20-21,708.18-13,403.40

Finding the Fourth Proportional to 15,736.20, 21,708.18 and 13,403.40

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Solution

The fourth proportional to 15,736.20, 21,708.18 and 13,403.40 is: 18,490.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,736.20 : 21,708.18 = 13,403.40 : x
  2. Step 2: Convert to fraction form
    15,736.20/21,708.18 = 13,403.40/x
  3. Step 3: Cross multiply
    15,736.20x = 21,708.18 × 13,403.40
  4. Step 4: Simplify right side
    15,736.20x = 290,963,419.81
  5. Step 5: Solve for x
    x = 290,963,419.81/15,736.20
  6. Step 6: Final answer
    x = 18,490.07

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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.