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Finding the Fourth Proportional to 15,828.71, 21,842.51 and 8,754.57

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Solution

The fourth proportional to 15,828.71, 21,842.51 and 8,754.57 is: 12,080.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,828.71 : 21,842.51 = 8,754.57 : x
  2. Step 2: Convert to fraction form
    15,828.71/21,842.51 = 8,754.57/x
  3. Step 3: Cross multiply
    15,828.71x = 21,842.51 × 8,754.57
  4. Step 4: Simplify right side
    15,828.71x = 191,221,739.00
  5. Step 5: Solve for x
    x = 191,221,739.00/15,828.71
  6. Step 6: Final answer
    x = 12,080.69

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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.