Home / 13,415.10-18,513.04-7,447.15

Finding the Fourth Proportional to 13,415.10, 18,513.04 and 7,447.15

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Solution

The fourth proportional to 13,415.10, 18,513.04 and 7,447.15 is: 10,277.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.10 : 18,513.04 = 7,447.15 : x
  2. Step 2: Convert to fraction form
    13,415.10/18,513.04 = 7,447.15/x
  3. Step 3: Cross multiply
    13,415.10x = 18,513.04 × 7,447.15
  4. Step 4: Simplify right side
    13,415.10x = 137,869,385.84
  5. Step 5: Solve for x
    x = 137,869,385.84/13,415.10
  6. Step 6: Final answer
    x = 10,277.18

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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.