Home / 15,615.68-21,513.48-10,891.76

Finding the Fourth Proportional to 15,615.68, 21,513.48 and 10,891.76

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Solution

The fourth proportional to 15,615.68, 21,513.48 and 10,891.76 is: 15,005.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,615.68 : 21,513.48 = 10,891.76 : x
  2. Step 2: Convert to fraction form
    15,615.68/21,513.48 = 10,891.76/x
  3. Step 3: Cross multiply
    15,615.68x = 21,513.48 × 10,891.76
  4. Step 4: Simplify right side
    15,615.68x = 234,319,660.92
  5. Step 5: Solve for x
    x = 234,319,660.92/15,615.68
  6. Step 6: Final answer
    x = 15,005.41

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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.