Home / 42,828.60-64,247.70-13,246.20

Finding the Fourth Proportional to 42,828.60, 64,247.70 and 13,246.20

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Solution

The fourth proportional to 42,828.60, 64,247.70 and 13,246.20 is: 19,870.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,828.60 : 64,247.70 = 13,246.20 : x
  2. Step 2: Convert to fraction form
    42,828.60/64,247.70 = 13,246.20/x
  3. Step 3: Cross multiply
    42,828.60x = 64,247.70 × 13,246.20
  4. Step 4: Simplify right side
    42,828.60x = 851,037,883.74
  5. Step 5: Solve for x
    x = 851,037,883.74/42,828.60
  6. Step 6: Final answer
    x = 19,870.78

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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.