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Finding the Fourth Proportional to 15,058.56, 20,780.76 and 8,434.56

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Solution

The fourth proportional to 15,058.56, 20,780.76 and 8,434.56 is: 11,639.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,058.56 : 20,780.76 = 8,434.56 : x
  2. Step 2: Convert to fraction form
    15,058.56/20,780.76 = 8,434.56/x
  3. Step 3: Cross multiply
    15,058.56x = 20,780.76 × 8,434.56
  4. Step 4: Simplify right side
    15,058.56x = 175,276,567.07
  5. Step 5: Solve for x
    x = 175,276,567.07/15,058.56
  6. Step 6: Final answer
    x = 11,639.66

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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.