Home / 13,390.27-18,478.33-7,421.92

Finding the Fourth Proportional to 13,390.27, 18,478.33 and 7,421.92

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Solution

The fourth proportional to 13,390.27, 18,478.33 and 7,421.92 is: 10,242.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.27 : 18,478.33 = 7,421.92 : x
  2. Step 2: Convert to fraction form
    13,390.27/18,478.33 = 7,421.92/x
  3. Step 3: Cross multiply
    13,390.27x = 18,478.33 × 7,421.92
  4. Step 4: Simplify right side
    13,390.27x = 137,144,622.24
  5. Step 5: Solve for x
    x = 137,144,622.24/13,390.27
  6. Step 6: Final answer
    x = 10,242.11

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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.