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Finding the Fourth Proportional to 28,497.40, 42,746.10 and 28,108.60

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Solution

The fourth proportional to 28,497.40, 42,746.10 and 28,108.60 is: 42,162.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,497.40 : 42,746.10 = 28,108.60 : x
  2. Step 2: Convert to fraction form
    28,497.40/42,746.10 = 28,108.60/x
  3. Step 3: Cross multiply
    28,497.40x = 42,746.10 × 28,108.60
  4. Step 4: Simplify right side
    28,497.40x = 1,201,533,026.46
  5. Step 5: Solve for x
    x = 1,201,533,026.46/28,497.40
  6. Step 6: Final answer
    x = 42,162.90

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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.