Home / 15,716.04-21,689.28-8,642.76

Finding the Fourth Proportional to 15,716.04, 21,689.28 and 8,642.76

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Solution

The fourth proportional to 15,716.04, 21,689.28 and 8,642.76 is: 11,927.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,716.04 : 21,689.28 = 8,642.76 : x
  2. Step 2: Convert to fraction form
    15,716.04/21,689.28 = 8,642.76/x
  3. Step 3: Cross multiply
    15,716.04x = 21,689.28 × 8,642.76
  4. Step 4: Simplify right side
    15,716.04x = 187,455,241.61
  5. Step 5: Solve for x
    x = 187,455,241.61/15,716.04
  6. Step 6: Final answer
    x = 11,927.64

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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.