Home / 8,897.32-12,279.21-5,120.63

Finding the Fourth Proportional to 8,897.32, 12,279.21 and 5,120.63

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Solution

The fourth proportional to 8,897.32, 12,279.21 and 5,120.63 is: 7,066.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,897.32 : 12,279.21 = 5,120.63 : x
  2. Step 2: Convert to fraction form
    8,897.32/12,279.21 = 5,120.63/x
  3. Step 3: Cross multiply
    8,897.32x = 12,279.21 × 5,120.63
  4. Step 4: Simplify right side
    8,897.32x = 62,877,229.71
  5. Step 5: Solve for x
    x = 62,877,229.71/8,897.32
  6. Step 6: Final answer
    x = 7,066.99

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Half scale
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Double scale
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Similar ratio
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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.