Home / 15,790.32-21,781.04-9,412.72

Finding the Fourth Proportional to 15,790.32, 21,781.04 and 9,412.72

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Solution

The fourth proportional to 15,790.32, 21,781.04 and 9,412.72 is: 12,983.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.32 : 21,781.04 = 9,412.72 : x
  2. Step 2: Convert to fraction form
    15,790.32/21,781.04 = 9,412.72/x
  3. Step 3: Cross multiply
    15,790.32x = 21,781.04 × 9,412.72
  4. Step 4: Simplify right side
    15,790.32x = 205,018,729.31
  5. Step 5: Solve for x
    x = 205,018,729.31/15,790.32
  6. Step 6: Final answer
    x = 12,983.82

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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.