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Finding the Fourth Proportional to 15,007.64, 20,710.76 and 8,720.01

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Solution

The fourth proportional to 15,007.64, 20,710.76 and 8,720.01 is: 12,033.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,007.64 : 20,710.76 = 8,720.01 : x
  2. Step 2: Convert to fraction form
    15,007.64/20,710.76 = 8,720.01/x
  3. Step 3: Cross multiply
    15,007.64x = 20,710.76 × 8,720.01
  4. Step 4: Simplify right side
    15,007.64x = 180,597,990.71
  5. Step 5: Solve for x
    x = 180,597,990.71/15,007.64
  6. Step 6: Final answer
    x = 12,033.74

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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.