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Finding the Fourth Proportional to 28,058.59, 38,695.55 and 21,675.59

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Solution

The fourth proportional to 28,058.59, 38,695.55 and 21,675.59 is: 29,892.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,058.59 : 38,695.55 = 21,675.59 : x
  2. Step 2: Convert to fraction form
    28,058.59/38,695.55 = 21,675.59/x
  3. Step 3: Cross multiply
    28,058.59x = 38,695.55 × 21,675.59
  4. Step 4: Simplify right side
    28,058.59x = 838,748,876.62
  5. Step 5: Solve for x
    x = 838,748,876.62/28,058.59
  6. Step 6: Final answer
    x = 29,892.77

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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.