Home / 21,988.76-30,343.20-13,037.12

Finding the Fourth Proportional to 21,988.76, 30,343.20 and 13,037.12

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Solution

The fourth proportional to 21,988.76, 30,343.20 and 13,037.12 is: 17,990.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.76 : 30,343.20 = 13,037.12 : x
  2. Step 2: Convert to fraction form
    21,988.76/30,343.20 = 13,037.12/x
  3. Step 3: Cross multiply
    21,988.76x = 30,343.20 × 13,037.12
  4. Step 4: Simplify right side
    21,988.76x = 395,587,939.58
  5. Step 5: Solve for x
    x = 395,587,939.58/21,988.76
  6. Step 6: Final answer
    x = 17,990.46

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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.