Home / 42,807.20-64,217.66-13,218.08

Finding the Fourth Proportional to 42,807.20, 64,217.66 and 13,218.08

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Solution

The fourth proportional to 42,807.20, 64,217.66 and 13,218.08 is: 19,829.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,807.20 : 64,217.66 = 13,218.08 : x
  2. Step 2: Convert to fraction form
    42,807.20/64,217.66 = 13,218.08/x
  3. Step 3: Cross multiply
    42,807.20x = 64,217.66 × 13,218.08
  4. Step 4: Simplify right side
    42,807.20x = 848,834,167.29
  5. Step 5: Solve for x
    x = 848,834,167.29/42,807.20
  6. Step 6: Final answer
    x = 19,829.24

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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.