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Finding the Fourth Proportional to 28,426.68, 42,644.82 and 8,703.12

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Solution

The fourth proportional to 28,426.68, 42,644.82 and 8,703.12 is: 13,056.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,426.68 : 42,644.82 = 8,703.12 : x
  2. Step 2: Convert to fraction form
    28,426.68/42,644.82 = 8,703.12/x
  3. Step 3: Cross multiply
    28,426.68x = 42,644.82 × 8,703.12
  4. Step 4: Simplify right side
    28,426.68x = 371,142,985.84
  5. Step 5: Solve for x
    x = 371,142,985.84/28,426.68
  6. Step 6: Final answer
    x = 13,056.15

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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.