Home / 13,515.50-18,650.60-7,547.55

Finding the Fourth Proportional to 13,515.50, 18,650.60 and 7,547.55

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Solution

The fourth proportional to 13,515.50, 18,650.60 and 7,547.55 is: 10,415.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.50 : 18,650.60 = 7,547.55 : x
  2. Step 2: Convert to fraction form
    13,515.50/18,650.60 = 7,547.55/x
  3. Step 3: Cross multiply
    13,515.50x = 18,650.60 × 7,547.55
  4. Step 4: Simplify right side
    13,515.50x = 140,766,336.03
  5. Step 5: Solve for x
    x = 140,766,336.03/13,515.50
  6. Step 6: Final answer
    x = 10,415.18

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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.