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Finding the Fourth Proportional to 48,390.80, 66,784.68 and 28,252.67

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Solution

The fourth proportional to 48,390.80, 66,784.68 and 28,252.67 is: 38,991.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,390.80 : 66,784.68 = 28,252.67 : x
  2. Step 2: Convert to fraction form
    48,390.80/66,784.68 = 28,252.67/x
  3. Step 3: Cross multiply
    48,390.80x = 66,784.68 × 28,252.67
  4. Step 4: Simplify right side
    48,390.80x = 1,886,845,191.17
  5. Step 5: Solve for x
    x = 1,886,845,191.17/48,390.80
  6. Step 6: Final answer
    x = 38,991.82

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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.