Home / 13,406.61-18,503.33-7,440.20

Finding the Fourth Proportional to 13,406.61, 18,503.33 and 7,440.20

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Solution

The fourth proportional to 13,406.61, 18,503.33 and 7,440.20 is: 10,268.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,406.61 : 18,503.33 = 7,440.20 : x
  2. Step 2: Convert to fraction form
    13,406.61/18,503.33 = 7,440.20/x
  3. Step 3: Cross multiply
    13,406.61x = 18,503.33 × 7,440.20
  4. Step 4: Simplify right side
    13,406.61x = 137,668,475.87
  5. Step 5: Solve for x
    x = 137,668,475.87/13,406.61
  6. Step 6: Final answer
    x = 10,268.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.