Home / 20,681.12-28,549.86-12,730.16

Finding the Fourth Proportional to 20,681.12, 28,549.86 and 12,730.16

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Solution

The fourth proportional to 20,681.12, 28,549.86 and 12,730.16 is: 17,573.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.12 : 28,549.86 = 12,730.16 : x
  2. Step 2: Convert to fraction form
    20,681.12/28,549.86 = 12,730.16/x
  3. Step 3: Cross multiply
    20,681.12x = 28,549.86 × 12,730.16
  4. Step 4: Simplify right side
    20,681.12x = 363,444,285.78
  5. Step 5: Solve for x
    x = 363,444,285.78/20,681.12
  6. Step 6: Final answer
    x = 17,573.72

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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.