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Finding the Fourth Proportional to 15,020.65, 20,724.26 and 8,970.18

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Solution

The fourth proportional to 15,020.65, 20,724.26 and 8,970.18 is: 12,376.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,020.65 : 20,724.26 = 8,970.18 : x
  2. Step 2: Convert to fraction form
    15,020.65/20,724.26 = 8,970.18/x
  3. Step 3: Cross multiply
    15,020.65x = 20,724.26 × 8,970.18
  4. Step 4: Simplify right side
    15,020.65x = 185,900,342.57
  5. Step 5: Solve for x
    x = 185,900,342.57/15,020.65
  6. Step 6: Final answer
    x = 12,376.32

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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.