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Finding the Fourth Proportional to 15,020.77, 20,725.45 and 8,729.77

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Solution

The fourth proportional to 15,020.77, 20,725.45 and 8,729.77 is: 12,045.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,020.77 : 20,725.45 = 8,729.77 : x
  2. Step 2: Convert to fraction form
    15,020.77/20,725.45 = 8,729.77/x
  3. Step 3: Cross multiply
    15,020.77x = 20,725.45 × 8,729.77
  4. Step 4: Simplify right side
    15,020.77x = 180,928,411.65
  5. Step 5: Solve for x
    x = 180,928,411.65/15,020.77
  6. Step 6: Final answer
    x = 12,045.22

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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.