Home / 13,352.28-18,419.88-8,638.08

Finding the Fourth Proportional to 13,352.28, 18,419.88 and 8,638.08

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Solution

The fourth proportional to 13,352.28, 18,419.88 and 8,638.08 is: 11,916.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,352.28 : 18,419.88 = 8,638.08 : x
  2. Step 2: Convert to fraction form
    13,352.28/18,419.88 = 8,638.08/x
  3. Step 3: Cross multiply
    13,352.28x = 18,419.88 × 8,638.08
  4. Step 4: Simplify right side
    13,352.28x = 159,112,397.03
  5. Step 5: Solve for x
    x = 159,112,397.03/13,352.28
  6. Step 6: Final answer
    x = 11,916.50

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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.