Home / 13,117.95-18,102.30-7,149.50

Finding the Fourth Proportional to 13,117.95, 18,102.30 and 7,149.50

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Solution

The fourth proportional to 13,117.95, 18,102.30 and 7,149.50 is: 9,866.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,117.95 : 18,102.30 = 7,149.50 : x
  2. Step 2: Convert to fraction form
    13,117.95/18,102.30 = 7,149.50/x
  3. Step 3: Cross multiply
    13,117.95x = 18,102.30 × 7,149.50
  4. Step 4: Simplify right side
    13,117.95x = 129,422,303.34
  5. Step 5: Solve for x
    x = 129,422,303.34/13,117.95
  6. Step 6: Final answer
    x = 9,866.05

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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.