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Finding the Fourth Proportional to 15,071.81, 20,801.07 and 9,412.34

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Solution

The fourth proportional to 15,071.81, 20,801.07 and 9,412.34 is: 12,990.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,071.81 : 20,801.07 = 9,412.34 : x
  2. Step 2: Convert to fraction form
    15,071.81/20,801.07 = 9,412.34/x
  3. Step 3: Cross multiply
    15,071.81x = 20,801.07 × 9,412.34
  4. Step 4: Simplify right side
    15,071.81x = 195,786,639.20
  5. Step 5: Solve for x
    x = 195,786,639.20/15,071.81
  6. Step 6: Final answer
    x = 12,990.26

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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.