Home / 8,740.80-13,111.20-5,630.40

Finding the Fourth Proportional to 8,740.80, 13,111.20 and 5,630.40

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Solution

The fourth proportional to 8,740.80, 13,111.20 and 5,630.40 is: 8,445.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,740.80 : 13,111.20 = 5,630.40 : x
  2. Step 2: Convert to fraction form
    8,740.80/13,111.20 = 5,630.40/x
  3. Step 3: Cross multiply
    8,740.80x = 13,111.20 × 5,630.40
  4. Step 4: Simplify right side
    8,740.80x = 73,821,300.48
  5. Step 5: Solve for x
    x = 73,821,300.48/8,740.80
  6. Step 6: Final answer
    x = 8,445.60

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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.