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Finding the Fourth Proportional to 15,356.22, 21,191.70 and 9,071.70

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Solution

The fourth proportional to 15,356.22, 21,191.70 and 9,071.70 is: 12,519.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,356.22 : 21,191.70 = 9,071.70 : x
  2. Step 2: Convert to fraction form
    15,356.22/21,191.70 = 9,071.70/x
  3. Step 3: Cross multiply
    15,356.22x = 21,191.70 × 9,071.70
  4. Step 4: Simplify right side
    15,356.22x = 192,244,744.89
  5. Step 5: Solve for x
    x = 192,244,744.89/15,356.22
  6. Step 6: Final answer
    x = 12,519.01

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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.