Home / 21,488.90-29,652.08-11,928.74

Finding the Fourth Proportional to 21,488.90, 29,652.08 and 11,928.74

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Solution

The fourth proportional to 21,488.90, 29,652.08 and 11,928.74 is: 16,460.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,488.90 : 29,652.08 = 11,928.74 : x
  2. Step 2: Convert to fraction form
    21,488.90/29,652.08 = 11,928.74/x
  3. Step 3: Cross multiply
    21,488.90x = 29,652.08 × 11,928.74
  4. Step 4: Simplify right side
    21,488.90x = 353,711,952.78
  5. Step 5: Solve for x
    x = 353,711,952.78/21,488.90
  6. Step 6: Final answer
    x = 16,460.22

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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.