Home / 42,865.80-64,298.70-11,275.80

Finding the Fourth Proportional to 42,865.80, 64,298.70 and 11,275.80

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Solution

The fourth proportional to 42,865.80, 64,298.70 and 11,275.80 is: 16,913.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,865.80 : 64,298.70 = 11,275.80 : x
  2. Step 2: Convert to fraction form
    42,865.80/64,298.70 = 11,275.80/x
  3. Step 3: Cross multiply
    42,865.80x = 64,298.70 × 11,275.80
  4. Step 4: Simplify right side
    42,865.80x = 725,019,281.46
  5. Step 5: Solve for x
    x = 725,019,281.46/42,865.80
  6. Step 6: Final answer
    x = 16,913.70

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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.