Home / 13,350.08-18,423.84-8,638.40

Finding the Fourth Proportional to 13,350.08, 18,423.84 and 8,638.40

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Solution

The fourth proportional to 13,350.08, 18,423.84 and 8,638.40 is: 11,921.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,350.08 : 18,423.84 = 8,638.40 : x
  2. Step 2: Convert to fraction form
    13,350.08/18,423.84 = 8,638.40/x
  3. Step 3: Cross multiply
    13,350.08x = 18,423.84 × 8,638.40
  4. Step 4: Simplify right side
    13,350.08x = 159,152,499.46
  5. Step 5: Solve for x
    x = 159,152,499.46/13,350.08
  6. Step 6: Final answer
    x = 11,921.46

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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.