Home / 15,461.47-21,336.60-8,387.79

Finding the Fourth Proportional to 15,461.47, 21,336.60 and 8,387.79

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Solution

The fourth proportional to 15,461.47, 21,336.60 and 8,387.79 is: 11,575.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,461.47 : 21,336.60 = 8,387.79 : x
  2. Step 2: Convert to fraction form
    15,461.47/21,336.60 = 8,387.79/x
  3. Step 3: Cross multiply
    15,461.47x = 21,336.60 × 8,387.79
  4. Step 4: Simplify right side
    15,461.47x = 178,966,920.11
  5. Step 5: Solve for x
    x = 178,966,920.11/15,461.47
  6. Step 6: Final answer
    x = 11,575.03

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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.