Home / 20,430.40-30,616.32-8,740.48

Finding the Fourth Proportional to 20,430.40, 30,616.32 and 8,740.48

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Solution

The fourth proportional to 20,430.40, 30,616.32 and 8,740.48 is: 13,098.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.40 : 30,616.32 = 8,740.48 : x
  2. Step 2: Convert to fraction form
    20,430.40/30,616.32 = 8,740.48/x
  3. Step 3: Cross multiply
    20,430.40x = 30,616.32 × 8,740.48
  4. Step 4: Simplify right side
    20,430.40x = 267,601,332.63
  5. Step 5: Solve for x
    x = 267,601,332.63/20,430.40
  6. Step 6: Final answer
    x = 13,098.19

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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.