Home / 15,416.80-21,275.25-8,702.71

Finding the Fourth Proportional to 15,416.80, 21,275.25 and 8,702.71

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Solution

The fourth proportional to 15,416.80, 21,275.25 and 8,702.71 is: 12,009.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,416.80 : 21,275.25 = 8,702.71 : x
  2. Step 2: Convert to fraction form
    15,416.80/21,275.25 = 8,702.71/x
  3. Step 3: Cross multiply
    15,416.80x = 21,275.25 × 8,702.71
  4. Step 4: Simplify right side
    15,416.80x = 185,152,330.93
  5. Step 5: Solve for x
    x = 185,152,330.93/15,416.80
  6. Step 6: Final answer
    x = 12,009.78

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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.