Home / 28,243.80-42,368.40-8,520.30

Finding the Fourth Proportional to 28,243.80, 42,368.40 and 8,520.30

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Solution

The fourth proportional to 28,243.80, 42,368.40 and 8,520.30 is: 12,781.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,243.80 : 42,368.40 = 8,520.30 : x
  2. Step 2: Convert to fraction form
    28,243.80/42,368.40 = 8,520.30/x
  3. Step 3: Cross multiply
    28,243.80x = 42,368.40 × 8,520.30
  4. Step 4: Simplify right side
    28,243.80x = 360,991,478.52
  5. Step 5: Solve for x
    x = 360,991,478.52/28,243.80
  6. Step 6: Final answer
    x = 12,781.26

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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.