Home / 28,066.80-38,732.16-15,491.52

Finding the Fourth Proportional to 28,066.80, 38,732.16 and 15,491.52

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Solution

The fourth proportional to 28,066.80, 38,732.16 and 15,491.52 is: 21,378.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,066.80 : 38,732.16 = 15,491.52 : x
  2. Step 2: Convert to fraction form
    28,066.80/38,732.16 = 15,491.52/x
  3. Step 3: Cross multiply
    28,066.80x = 38,732.16 × 15,491.52
  4. Step 4: Simplify right side
    28,066.80x = 600,020,031.28
  5. Step 5: Solve for x
    x = 600,020,031.28/28,066.80
  6. Step 6: Final answer
    x = 21,378.28

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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.