Home / 21,228.15-29,294.97-13,275.03

Finding the Fourth Proportional to 21,228.15, 29,294.97 and 13,275.03

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Solution

The fourth proportional to 21,228.15, 29,294.97 and 13,275.03 is: 18,319.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.15 : 29,294.97 = 13,275.03 : x
  2. Step 2: Convert to fraction form
    21,228.15/29,294.97 = 13,275.03/x
  3. Step 3: Cross multiply
    21,228.15x = 29,294.97 × 13,275.03
  4. Step 4: Simplify right side
    21,228.15x = 388,891,605.60
  5. Step 5: Solve for x
    x = 388,891,605.60/21,228.15
  6. Step 6: Final answer
    x = 18,319.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.