Home / 13,386.40-18,472.98-7,418.05

Finding the Fourth Proportional to 13,386.40, 18,472.98 and 7,418.05

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Solution

The fourth proportional to 13,386.40, 18,472.98 and 7,418.05 is: 10,236.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,386.40 : 18,472.98 = 7,418.05 : x
  2. Step 2: Convert to fraction form
    13,386.40/18,472.98 = 7,418.05/x
  3. Step 3: Cross multiply
    13,386.40x = 18,472.98 × 7,418.05
  4. Step 4: Simplify right side
    13,386.40x = 137,033,489.29
  5. Step 5: Solve for x
    x = 137,033,489.29/13,386.40
  6. Step 6: Final answer
    x = 10,236.77

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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.