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Finding the Fourth Proportional to 18,710.61, 28,080.19 and 6,875.60

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Solution

The fourth proportional to 18,710.61, 28,080.19 and 6,875.60 is: 10,318.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.61 : 28,080.19 = 6,875.60 : x
  2. Step 2: Convert to fraction form
    18,710.61/28,080.19 = 6,875.60/x
  3. Step 3: Cross multiply
    18,710.61x = 28,080.19 × 6,875.60
  4. Step 4: Simplify right side
    18,710.61x = 193,068,084.16
  5. Step 5: Solve for x
    x = 193,068,084.16/18,710.61
  6. Step 6: Final answer
    x = 10,318.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.