Home / 13,228.30-18,254.50-7,920.02

Finding the Fourth Proportional to 13,228.30, 18,254.50 and 7,920.02

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Solution

The fourth proportional to 13,228.30, 18,254.50 and 7,920.02 is: 10,929.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,228.30 : 18,254.50 = 7,920.02 : x
  2. Step 2: Convert to fraction form
    13,228.30/18,254.50 = 7,920.02/x
  3. Step 3: Cross multiply
    13,228.30x = 18,254.50 × 7,920.02
  4. Step 4: Simplify right side
    13,228.30x = 144,576,005.09
  5. Step 5: Solve for x
    x = 144,576,005.09/13,228.30
  6. Step 6: Final answer
    x = 10,929.30

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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.