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Finding the Fourth Proportional to 58,657.80, 87,986.70 and 19,218.90

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Solution

The fourth proportional to 58,657.80, 87,986.70 and 19,218.90 is: 28,828.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,657.80 : 87,986.70 = 19,218.90 : x
  2. Step 2: Convert to fraction form
    58,657.80/87,986.70 = 19,218.90/x
  3. Step 3: Cross multiply
    58,657.80x = 87,986.70 × 19,218.90
  4. Step 4: Simplify right side
    58,657.80x = 1,691,007,588.63
  5. Step 5: Solve for x
    x = 1,691,007,588.63/58,657.80
  6. Step 6: Final answer
    x = 28,828.35

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.