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Finding the Fourth Proportional to 28,070.70, 42,111.90 and 9,356.55

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Solution

The fourth proportional to 28,070.70, 42,111.90 and 9,356.55 is: 14,036.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,070.70 : 42,111.90 = 9,356.55 : x
  2. Step 2: Convert to fraction form
    28,070.70/42,111.90 = 9,356.55/x
  3. Step 3: Cross multiply
    28,070.70x = 42,111.90 × 9,356.55
  4. Step 4: Simplify right side
    28,070.70x = 394,022,097.95
  5. Step 5: Solve for x
    x = 394,022,097.95/28,070.70
  6. Step 6: Final answer
    x = 14,036.77

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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.