Home / 13,140.93-18,134.19-7,172.70

Finding the Fourth Proportional to 13,140.93, 18,134.19 and 7,172.70

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Solution

The fourth proportional to 13,140.93, 18,134.19 and 7,172.70 is: 9,898.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.93 : 18,134.19 = 7,172.70 : x
  2. Step 2: Convert to fraction form
    13,140.93/18,134.19 = 7,172.70/x
  3. Step 3: Cross multiply
    13,140.93x = 18,134.19 × 7,172.70
  4. Step 4: Simplify right side
    13,140.93x = 130,071,050.06
  5. Step 5: Solve for x
    x = 130,071,050.06/13,140.93
  6. Step 6: Final answer
    x = 9,898.16

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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.