Home / 28,002.16-38,642.52-15,428.08

Finding the Fourth Proportional to 28,002.16, 38,642.52 and 15,428.08

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Solution

The fourth proportional to 28,002.16, 38,642.52 and 15,428.08 is: 21,290.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,002.16 : 38,642.52 = 15,428.08 : x
  2. Step 2: Convert to fraction form
    28,002.16/38,642.52 = 15,428.08/x
  3. Step 3: Cross multiply
    28,002.16x = 38,642.52 × 15,428.08
  4. Step 4: Simplify right side
    28,002.16x = 596,179,889.96
  5. Step 5: Solve for x
    x = 596,179,889.96/28,002.16
  6. Step 6: Final answer
    x = 21,290.50

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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.