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Finding the Fourth Proportional to 28,124.40, 42,186.60 and 8,402.32

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Solution

The fourth proportional to 28,124.40, 42,186.60 and 8,402.32 is: 12,603.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,124.40 : 42,186.60 = 8,402.32 : x
  2. Step 2: Convert to fraction form
    28,124.40/42,186.60 = 8,402.32/x
  3. Step 3: Cross multiply
    28,124.40x = 42,186.60 × 8,402.32
  4. Step 4: Simplify right side
    28,124.40x = 354,465,312.91
  5. Step 5: Solve for x
    x = 354,465,312.91/28,124.40
  6. Step 6: Final answer
    x = 12,603.48

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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.