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Finding the Fourth Proportional to 28,490.81, 42,734.93 and 19,134.77

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Solution

The fourth proportional to 28,490.81, 42,734.93 and 19,134.77 is: 28,701.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.81 : 42,734.93 = 19,134.77 : x
  2. Step 2: Convert to fraction form
    28,490.81/42,734.93 = 19,134.77/x
  3. Step 3: Cross multiply
    28,490.81x = 42,734.93 × 19,134.77
  4. Step 4: Simplify right side
    28,490.81x = 817,722,747.17
  5. Step 5: Solve for x
    x = 817,722,747.17/28,490.81
  6. Step 6: Final answer
    x = 28,701.29

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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.