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Finding the Fourth Proportional to 15,585.51, 21,502.68 and 8,869.47

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Solution

The fourth proportional to 15,585.51, 21,502.68 and 8,869.47 is: 12,236.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,585.51 : 21,502.68 = 8,869.47 : x
  2. Step 2: Convert to fraction form
    15,585.51/21,502.68 = 8,869.47/x
  3. Step 3: Cross multiply
    15,585.51x = 21,502.68 × 8,869.47
  4. Step 4: Simplify right side
    15,585.51x = 190,717,261.28
  5. Step 5: Solve for x
    x = 190,717,261.28/15,585.51
  6. Step 6: Final answer
    x = 12,236.83

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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.