Home / 15,490.87-21,377.49-9,117.70

Finding the Fourth Proportional to 15,490.87, 21,377.49 and 9,117.70

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Solution

The fourth proportional to 15,490.87, 21,377.49 and 9,117.70 is: 12,582.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.87 : 21,377.49 = 9,117.70 : x
  2. Step 2: Convert to fraction form
    15,490.87/21,377.49 = 9,117.70/x
  3. Step 3: Cross multiply
    15,490.87x = 21,377.49 × 9,117.70
  4. Step 4: Simplify right side
    15,490.87x = 194,913,540.57
  5. Step 5: Solve for x
    x = 194,913,540.57/15,490.87
  6. Step 6: Final answer
    x = 12,582.48

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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.