Home / 13,685.40-20,541.12-7,116.36

Finding the Fourth Proportional to 13,685.40, 20,541.12 and 7,116.36

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Solution

The fourth proportional to 13,685.40, 20,541.12 and 7,116.36 is: 10,681.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.40 : 20,541.12 = 7,116.36 : x
  2. Step 2: Convert to fraction form
    13,685.40/20,541.12 = 7,116.36/x
  3. Step 3: Cross multiply
    13,685.40x = 20,541.12 × 7,116.36
  4. Step 4: Simplify right side
    13,685.40x = 146,178,004.72
  5. Step 5: Solve for x
    x = 146,178,004.72/13,685.40
  6. Step 6: Final answer
    x = 10,681.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.