Home / 21,552.65-29,742.19-12,478.39

Finding the Fourth Proportional to 21,552.65, 29,742.19 and 12,478.39

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Solution

The fourth proportional to 21,552.65, 29,742.19 and 12,478.39 is: 17,219.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,552.65 : 29,742.19 = 12,478.39 : x
  2. Step 2: Convert to fraction form
    21,552.65/29,742.19 = 12,478.39/x
  3. Step 3: Cross multiply
    21,552.65x = 29,742.19 × 12,478.39
  4. Step 4: Simplify right side
    21,552.65x = 371,134,708.02
  5. Step 5: Solve for x
    x = 371,134,708.02/21,552.65
  6. Step 6: Final answer
    x = 17,219.91

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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.