Home / 15,730.38-21,681.72-13,494.78

Finding the Fourth Proportional to 15,730.38, 21,681.72 and 13,494.78

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Solution

The fourth proportional to 15,730.38, 21,681.72 and 13,494.78 is: 18,600.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,730.38 : 21,681.72 = 13,494.78 : x
  2. Step 2: Convert to fraction form
    15,730.38/21,681.72 = 13,494.78/x
  3. Step 3: Cross multiply
    15,730.38x = 21,681.72 × 13,494.78
  4. Step 4: Simplify right side
    15,730.38x = 292,590,041.42
  5. Step 5: Solve for x
    x = 292,590,041.42/15,730.38
  6. Step 6: Final answer
    x = 18,600.32

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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.