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Finding the Fourth Proportional to 42,887.65, 64,343.01 and 17,919.40

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Solution

The fourth proportional to 42,887.65, 64,343.01 and 17,919.40 is: 26,883.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,887.65 : 64,343.01 = 17,919.40 : x
  2. Step 2: Convert to fraction form
    42,887.65/64,343.01 = 17,919.40/x
  3. Step 3: Cross multiply
    42,887.65x = 64,343.01 × 17,919.40
  4. Step 4: Simplify right side
    42,887.65x = 1,152,988,133.39
  5. Step 5: Solve for x
    x = 1,152,988,133.39/42,887.65
  6. Step 6: Final answer
    x = 26,883.92

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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.