Home / 21,478.52-32,225.97-12,129.09

Finding the Fourth Proportional to 21,478.52, 32,225.97 and 12,129.09

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Solution

The fourth proportional to 21,478.52, 32,225.97 and 12,129.09 is: 18,198.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,478.52 : 32,225.97 = 12,129.09 : x
  2. Step 2: Convert to fraction form
    21,478.52/32,225.97 = 12,129.09/x
  3. Step 3: Cross multiply
    21,478.52x = 32,225.97 × 12,129.09
  4. Step 4: Simplify right side
    21,478.52x = 390,871,690.47
  5. Step 5: Solve for x
    x = 390,871,690.47/21,478.52
  6. Step 6: Final answer
    x = 18,198.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.