Home / 13,133.72-18,124.20-7,165.50

Finding the Fourth Proportional to 13,133.72, 18,124.20 and 7,165.50

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Solution

The fourth proportional to 13,133.72, 18,124.20 and 7,165.50 is: 9,888.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,133.72 : 18,124.20 = 7,165.50 : x
  2. Step 2: Convert to fraction form
    13,133.72/18,124.20 = 7,165.50/x
  3. Step 3: Cross multiply
    13,133.72x = 18,124.20 × 7,165.50
  4. Step 4: Simplify right side
    13,133.72x = 129,868,955.10
  5. Step 5: Solve for x
    x = 129,868,955.10/13,133.72
  6. Step 6: Final answer
    x = 9,888.21

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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.