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Finding the Fourth Proportional to 15,721.17, 21,698.29 and 9,011.29

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Solution

The fourth proportional to 15,721.17, 21,698.29 and 9,011.29 is: 12,437.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.17 : 21,698.29 = 9,011.29 : x
  2. Step 2: Convert to fraction form
    15,721.17/21,698.29 = 9,011.29/x
  3. Step 3: Cross multiply
    15,721.17x = 21,698.29 × 9,011.29
  4. Step 4: Simplify right side
    15,721.17x = 195,529,540.71
  5. Step 5: Solve for x
    x = 195,529,540.71/15,721.17
  6. Step 6: Final answer
    x = 12,437.34

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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.