Home / 42,810.20-64,222.14-13,221.08

Finding the Fourth Proportional to 42,810.20, 64,222.14 and 13,221.08

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Solution

The fourth proportional to 42,810.20, 64,222.14 and 13,221.08 is: 19,833.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,810.20 : 64,222.14 = 13,221.08 : x
  2. Step 2: Convert to fraction form
    42,810.20/64,222.14 = 13,221.08/x
  3. Step 3: Cross multiply
    42,810.20x = 64,222.14 × 13,221.08
  4. Step 4: Simplify right side
    42,810.20x = 849,086,050.71
  5. Step 5: Solve for x
    x = 849,086,050.71/42,810.20
  6. Step 6: Final answer
    x = 19,833.73

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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.