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Finding the Fourth Proportional to 18,875.70, 28,281.15 and 8,993.70

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Solution

The fourth proportional to 18,875.70, 28,281.15 and 8,993.70 is: 13,475.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,875.70 : 28,281.15 = 8,993.70 : x
  2. Step 2: Convert to fraction form
    18,875.70/28,281.15 = 8,993.70/x
  3. Step 3: Cross multiply
    18,875.70x = 28,281.15 × 8,993.70
  4. Step 4: Simplify right side
    18,875.70x = 254,352,178.76
  5. Step 5: Solve for x
    x = 254,352,178.76/18,875.70
  6. Step 6: Final answer
    x = 13,475.11

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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.