Home / 18,378.15-25,360.20-12,417.81

Finding the Fourth Proportional to 18,378.15, 25,360.20 and 12,417.81

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Solution

The fourth proportional to 18,378.15, 25,360.20 and 12,417.81 is: 17,135.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.15 : 25,360.20 = 12,417.81 : x
  2. Step 2: Convert to fraction form
    18,378.15/25,360.20 = 12,417.81/x
  3. Step 3: Cross multiply
    18,378.15x = 25,360.20 × 12,417.81
  4. Step 4: Simplify right side
    18,378.15x = 314,918,145.16
  5. Step 5: Solve for x
    x = 314,918,145.16/18,378.15
  6. Step 6: Final answer
    x = 17,135.46

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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.