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Finding the Fourth Proportional to 15,061.18, 20,784.47 and 8,346.91

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Solution

The fourth proportional to 15,061.18, 20,784.47 and 8,346.91 is: 11,518.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,061.18 : 20,784.47 = 8,346.91 : x
  2. Step 2: Convert to fraction form
    15,061.18/20,784.47 = 8,346.91/x
  3. Step 3: Cross multiply
    15,061.18x = 20,784.47 × 8,346.91
  4. Step 4: Simplify right side
    15,061.18x = 173,486,058.75
  5. Step 5: Solve for x
    x = 173,486,058.75/15,061.18
  6. Step 6: Final answer
    x = 11,518.76

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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.