Home / 28,886.40-39,859.20-16,139.04

Finding the Fourth Proportional to 28,886.40, 39,859.20 and 16,139.04

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Solution

The fourth proportional to 28,886.40, 39,859.20 and 16,139.04 is: 22,269.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,886.40 : 39,859.20 = 16,139.04 : x
  2. Step 2: Convert to fraction form
    28,886.40/39,859.20 = 16,139.04/x
  3. Step 3: Cross multiply
    28,886.40x = 39,859.20 × 16,139.04
  4. Step 4: Simplify right side
    28,886.40x = 643,289,223.17
  5. Step 5: Solve for x
    x = 643,289,223.17/28,886.40
  6. Step 6: Final answer
    x = 22,269.62

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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.