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Finding the Fourth Proportional to 20,875.96, 28,807.98 and 12,497.08

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Solution

The fourth proportional to 20,875.96, 28,807.98 and 12,497.08 is: 17,245.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.96 : 28,807.98 = 12,497.08 : x
  2. Step 2: Convert to fraction form
    20,875.96/28,807.98 = 12,497.08/x
  3. Step 3: Cross multiply
    20,875.96x = 28,807.98 × 12,497.08
  4. Step 4: Simplify right side
    20,875.96x = 360,015,630.70
  5. Step 5: Solve for x
    x = 360,015,630.70/20,875.96
  6. Step 6: Final answer
    x = 17,245.46

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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.