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Finding the Fourth Proportional to 28,595.40, 42,877.68 and 8,868.64

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Solution

The fourth proportional to 28,595.40, 42,877.68 and 8,868.64 is: 13,298.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,595.40 : 42,877.68 = 8,868.64 : x
  2. Step 2: Convert to fraction form
    28,595.40/42,877.68 = 8,868.64/x
  3. Step 3: Cross multiply
    28,595.40x = 42,877.68 × 8,868.64
  4. Step 4: Simplify right side
    28,595.40x = 380,266,707.96
  5. Step 5: Solve for x
    x = 380,266,707.96/28,595.40
  6. Step 6: Final answer
    x = 13,298.18

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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.