Home / 13,405.95-18,500.16-7,438.50

Finding the Fourth Proportional to 13,405.95, 18,500.16 and 7,438.50

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Solution

The fourth proportional to 13,405.95, 18,500.16 and 7,438.50 is: 10,265.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.95 : 18,500.16 = 7,438.50 : x
  2. Step 2: Convert to fraction form
    13,405.95/18,500.16 = 7,438.50/x
  3. Step 3: Cross multiply
    13,405.95x = 18,500.16 × 7,438.50
  4. Step 4: Simplify right side
    13,405.95x = 137,613,440.16
  5. Step 5: Solve for x
    x = 137,613,440.16/13,405.95
  6. Step 6: Final answer
    x = 10,265.10

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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.