Home / 15,304.45-21,120.15-8,590.72

Finding the Fourth Proportional to 15,304.45, 21,120.15 and 8,590.72

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Solution

The fourth proportional to 15,304.45, 21,120.15 and 8,590.72 is: 11,855.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,304.45 : 21,120.15 = 8,590.72 : x
  2. Step 2: Convert to fraction form
    15,304.45/21,120.15 = 8,590.72/x
  3. Step 3: Cross multiply
    15,304.45x = 21,120.15 × 8,590.72
  4. Step 4: Simplify right side
    15,304.45x = 181,437,295.01
  5. Step 5: Solve for x
    x = 181,437,295.01/15,304.45
  6. Step 6: Final answer
    x = 11,855.20

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Half scale
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Double scale
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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.