Home / 13,707.97-18,916.61-7,740.20

Finding the Fourth Proportional to 13,707.97, 18,916.61 and 7,740.20

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Solution

The fourth proportional to 13,707.97, 18,916.61 and 7,740.20 is: 10,681.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,707.97 : 18,916.61 = 7,740.20 : x
  2. Step 2: Convert to fraction form
    13,707.97/18,916.61 = 7,740.20/x
  3. Step 3: Cross multiply
    13,707.97x = 18,916.61 × 7,740.20
  4. Step 4: Simplify right side
    13,707.97x = 146,418,353.31
  5. Step 5: Solve for x
    x = 146,418,353.31/13,707.97
  6. Step 6: Final answer
    x = 10,681.26

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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.