Home / 19,869.20-27,421.88-11,915.80

Finding the Fourth Proportional to 19,869.20, 27,421.88 and 11,915.80

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Solution

The fourth proportional to 19,869.20, 27,421.88 and 11,915.80 is: 16,445.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,869.20 : 27,421.88 = 11,915.80 : x
  2. Step 2: Convert to fraction form
    19,869.20/27,421.88 = 11,915.80/x
  3. Step 3: Cross multiply
    19,869.20x = 27,421.88 × 11,915.80
  4. Step 4: Simplify right side
    19,869.20x = 326,753,637.70
  5. Step 5: Solve for x
    x = 326,753,637.70/19,869.20
  6. Step 6: Final answer
    x = 16,445.23

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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.