Home / 15,531.91-21,434.05-8,458.35

Finding the Fourth Proportional to 15,531.91, 21,434.05 and 8,458.35

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Solution

The fourth proportional to 15,531.91, 21,434.05 and 8,458.35 is: 11,672.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.91 : 21,434.05 = 8,458.35 : x
  2. Step 2: Convert to fraction form
    15,531.91/21,434.05 = 8,458.35/x
  3. Step 3: Cross multiply
    15,531.91x = 21,434.05 × 8,458.35
  4. Step 4: Simplify right side
    15,531.91x = 181,296,696.82
  5. Step 5: Solve for x
    x = 181,296,696.82/15,531.91
  6. Step 6: Final answer
    x = 11,672.53

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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.