Home / 28,876.80-43,315.20-18,897.60

Finding the Fourth Proportional to 28,876.80, 43,315.20 and 18,897.60

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Solution

The fourth proportional to 28,876.80, 43,315.20 and 18,897.60 is: 28,346.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,876.80 : 43,315.20 = 18,897.60 : x
  2. Step 2: Convert to fraction form
    28,876.80/43,315.20 = 18,897.60/x
  3. Step 3: Cross multiply
    28,876.80x = 43,315.20 × 18,897.60
  4. Step 4: Simplify right side
    28,876.80x = 818,553,323.52
  5. Step 5: Solve for x
    x = 818,553,323.52/28,876.80
  6. Step 6: Final answer
    x = 28,346.40

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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.