Home / 13,398.68-18,490.40-7,430.60

Finding the Fourth Proportional to 13,398.68, 18,490.40 and 7,430.60

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Solution

The fourth proportional to 13,398.68, 18,490.40 and 7,430.60 is: 10,254.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,398.68 : 18,490.40 = 7,430.60 : x
  2. Step 2: Convert to fraction form
    13,398.68/18,490.40 = 7,430.60/x
  3. Step 3: Cross multiply
    13,398.68x = 18,490.40 × 7,430.60
  4. Step 4: Simplify right side
    13,398.68x = 137,394,766.24
  5. Step 5: Solve for x
    x = 137,394,766.24/13,398.68
  6. Step 6: Final answer
    x = 10,254.35

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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.