Home / 15,857.16-21,877.25-9,479.31

Finding the Fourth Proportional to 15,857.16, 21,877.25 and 9,479.31

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Solution

The fourth proportional to 15,857.16, 21,877.25 and 9,479.31 is: 13,078.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,857.16 : 21,877.25 = 9,479.31 : x
  2. Step 2: Convert to fraction form
    15,857.16/21,877.25 = 9,479.31/x
  3. Step 3: Cross multiply
    15,857.16x = 21,877.25 × 9,479.31
  4. Step 4: Simplify right side
    15,857.16x = 207,381,187.30
  5. Step 5: Solve for x
    x = 207,381,187.30/15,857.16
  6. Step 6: Final answer
    x = 13,078.08

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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.