Home / 21,530.32-29,708.04-13,149.52

Finding the Fourth Proportional to 21,530.32, 29,708.04 and 13,149.52

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Solution

The fourth proportional to 21,530.32, 29,708.04 and 13,149.52 is: 18,144.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,530.32 : 29,708.04 = 13,149.52 : x
  2. Step 2: Convert to fraction form
    21,530.32/29,708.04 = 13,149.52/x
  3. Step 3: Cross multiply
    21,530.32x = 29,708.04 × 13,149.52
  4. Step 4: Simplify right side
    21,530.32x = 390,646,466.14
  5. Step 5: Solve for x
    x = 390,646,466.14/21,530.32
  6. Step 6: Final answer
    x = 18,144.02

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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.