Home / 21,931.90-30,266.19-12,109.44

Finding the Fourth Proportional to 21,931.90, 30,266.19 and 12,109.44

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Solution

The fourth proportional to 21,931.90, 30,266.19 and 12,109.44 is: 16,711.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.90 : 30,266.19 = 12,109.44 : x
  2. Step 2: Convert to fraction form
    21,931.90/30,266.19 = 12,109.44/x
  3. Step 3: Cross multiply
    21,931.90x = 30,266.19 × 12,109.44
  4. Step 4: Simplify right side
    21,931.90x = 366,506,725.33
  5. Step 5: Solve for x
    x = 366,506,725.33/21,931.90
  6. Step 6: Final answer
    x = 16,711.13

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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.