Home / 28,360.16-42,542.40-8,640.40

Finding the Fourth Proportional to 28,360.16, 42,542.40 and 8,640.40

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Solution

The fourth proportional to 28,360.16, 42,542.40 and 8,640.40 is: 12,961.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,360.16 : 42,542.40 = 8,640.40 : x
  2. Step 2: Convert to fraction form
    28,360.16/42,542.40 = 8,640.40/x
  3. Step 3: Cross multiply
    28,360.16x = 42,542.40 × 8,640.40
  4. Step 4: Simplify right side
    28,360.16x = 367,583,352.96
  5. Step 5: Solve for x
    x = 367,583,352.96/28,360.16
  6. Step 6: Final answer
    x = 12,961.26

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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.