Home / 21,818.08-30,109.80-12,387.52

Finding the Fourth Proportional to 21,818.08, 30,109.80 and 12,387.52

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Solution

The fourth proportional to 21,818.08, 30,109.80 and 12,387.52 is: 17,095.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,818.08 : 30,109.80 = 12,387.52 : x
  2. Step 2: Convert to fraction form
    21,818.08/30,109.80 = 12,387.52/x
  3. Step 3: Cross multiply
    21,818.08x = 30,109.80 × 12,387.52
  4. Step 4: Simplify right side
    21,818.08x = 372,985,749.70
  5. Step 5: Solve for x
    x = 372,985,749.70/21,818.08
  6. Step 6: Final answer
    x = 17,095.26

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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.