Home / 42,858.26-64,290.40-13,272.20

Finding the Fourth Proportional to 42,858.26, 64,290.40 and 13,272.20

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Solution

The fourth proportional to 42,858.26, 64,290.40 and 13,272.20 is: 19,909.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,858.26 : 64,290.40 = 13,272.20 : x
  2. Step 2: Convert to fraction form
    42,858.26/64,290.40 = 13,272.20/x
  3. Step 3: Cross multiply
    42,858.26x = 64,290.40 × 13,272.20
  4. Step 4: Simplify right side
    42,858.26x = 853,275,046.88
  5. Step 5: Solve for x
    x = 853,275,046.88/42,858.26
  6. Step 6: Final answer
    x = 19,909.23

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1.5x scale

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.