Home / 15,665.40-21,618.06-8,951.16

Finding the Fourth Proportional to 15,665.40, 21,618.06 and 8,951.16

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Solution

The fourth proportional to 15,665.40, 21,618.06 and 8,951.16 is: 12,352.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,665.40 : 21,618.06 = 8,951.16 : x
  2. Step 2: Convert to fraction form
    15,665.40/21,618.06 = 8,951.16/x
  3. Step 3: Cross multiply
    15,665.40x = 21,618.06 × 8,951.16
  4. Step 4: Simplify right side
    15,665.40x = 193,506,713.95
  5. Step 5: Solve for x
    x = 193,506,713.95/15,665.40
  6. Step 6: Final answer
    x = 12,352.49

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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.