Home / 13,124.71-18,112.11-7,156.32

Finding the Fourth Proportional to 13,124.71, 18,112.11 and 7,156.32

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Solution

The fourth proportional to 13,124.71, 18,112.11 and 7,156.32 is: 9,875.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,124.71 : 18,112.11 = 7,156.32 : x
  2. Step 2: Convert to fraction form
    13,124.71/18,112.11 = 7,156.32/x
  3. Step 3: Cross multiply
    13,124.71x = 18,112.11 × 7,156.32
  4. Step 4: Simplify right side
    13,124.71x = 129,616,055.04
  5. Step 5: Solve for x
    x = 129,616,055.04/13,124.71
  6. Step 6: Final answer
    x = 9,875.73

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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.