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Finding the Fourth Proportional to 19,901.87, 29,852.89 and 18,904.16

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Solution

The fourth proportional to 19,901.87, 29,852.89 and 18,904.16 is: 28,356.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,901.87 : 29,852.89 = 18,904.16 : x
  2. Step 2: Convert to fraction form
    19,901.87/29,852.89 = 18,904.16/x
  3. Step 3: Cross multiply
    19,901.87x = 29,852.89 × 18,904.16
  4. Step 4: Simplify right side
    19,901.87x = 564,343,836.39
  5. Step 5: Solve for x
    x = 564,343,836.39/19,901.87
  6. Step 6: Final answer
    x = 28,356.32

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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.