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Finding the Fourth Proportional to 15,301, 21,115.38 and 9,017.20

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Solution

The fourth proportional to 15,301, 21,115.38 and 9,017.20 is: 12,443.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,301 : 21,115.38 = 9,017.20 : x
  2. Step 2: Convert to fraction form
    15,301/21,115.38 = 9,017.20/x
  3. Step 3: Cross multiply
    15,301x = 21,115.38 × 9,017.20
  4. Step 4: Simplify right side
    15,301x = 190,401,604.54
  5. Step 5: Solve for x
    x = 190,401,604.54/15,301
  6. Step 6: Final answer
    x = 12,443.74

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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.