Home / 15,932.40-21,990.60-9,646.80

Finding the Fourth Proportional to 15,932.40, 21,990.60 and 9,646.80

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Solution

The fourth proportional to 15,932.40, 21,990.60 and 9,646.80 is: 13,314.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,932.40 : 21,990.60 = 9,646.80 : x
  2. Step 2: Convert to fraction form
    15,932.40/21,990.60 = 9,646.80/x
  3. Step 3: Cross multiply
    15,932.40x = 21,990.60 × 9,646.80
  4. Step 4: Simplify right side
    15,932.40x = 212,138,920.08
  5. Step 5: Solve for x
    x = 212,138,920.08/15,932.40
  6. Step 6: Final answer
    x = 13,314.94

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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.