Home / 13,155.47-18,155.80-7,188.04

Finding the Fourth Proportional to 13,155.47, 18,155.80 and 7,188.04

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Solution

The fourth proportional to 13,155.47, 18,155.80 and 7,188.04 is: 9,920.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.47 : 18,155.80 = 7,188.04 : x
  2. Step 2: Convert to fraction form
    13,155.47/18,155.80 = 7,188.04/x
  3. Step 3: Cross multiply
    13,155.47x = 18,155.80 × 7,188.04
  4. Step 4: Simplify right side
    13,155.47x = 130,504,616.63
  5. Step 5: Solve for x
    x = 130,504,616.63/13,155.47
  6. Step 6: Final answer
    x = 9,920.18

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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.