Home / 15,352.61-21,187.01-8,638.47

Finding the Fourth Proportional to 15,352.61, 21,187.01 and 8,638.47

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Solution

The fourth proportional to 15,352.61, 21,187.01 and 8,638.47 is: 11,921.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,352.61 : 21,187.01 = 8,638.47 : x
  2. Step 2: Convert to fraction form
    15,352.61/21,187.01 = 8,638.47/x
  3. Step 3: Cross multiply
    15,352.61x = 21,187.01 × 8,638.47
  4. Step 4: Simplify right side
    15,352.61x = 183,023,425.39
  5. Step 5: Solve for x
    x = 183,023,425.39/15,352.61
  6. Step 6: Final answer
    x = 11,921.33

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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.