Home / 21,223.60-31,869.40-16,877.20

Finding the Fourth Proportional to 21,223.60, 31,869.40 and 16,877.20

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Solution

The fourth proportional to 21,223.60, 31,869.40 and 16,877.20 is: 25,342.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,223.60 : 31,869.40 = 16,877.20 : x
  2. Step 2: Convert to fraction form
    21,223.60/31,869.40 = 16,877.20/x
  3. Step 3: Cross multiply
    21,223.60x = 31,869.40 × 16,877.20
  4. Step 4: Simplify right side
    21,223.60x = 537,866,237.68
  5. Step 5: Solve for x
    x = 537,866,237.68/21,223.60
  6. Step 6: Final answer
    x = 25,342.84

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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.