Home / 20,291.52-28,038.07-15,616.20

Finding the Fourth Proportional to 20,291.52, 28,038.07 and 15,616.20

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Solution

The fourth proportional to 20,291.52, 28,038.07 and 15,616.20 is: 21,577.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.52 : 28,038.07 = 15,616.20 : x
  2. Step 2: Convert to fraction form
    20,291.52/28,038.07 = 15,616.20/x
  3. Step 3: Cross multiply
    20,291.52x = 28,038.07 × 15,616.20
  4. Step 4: Simplify right side
    20,291.52x = 437,848,030.65
  5. Step 5: Solve for x
    x = 437,848,030.65/20,291.52
  6. Step 6: Final answer
    x = 21,577.88

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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.