Home / 13,386.20-20,071.20-5,989.28

Finding the Fourth Proportional to 13,386.20, 20,071.20 and 5,989.28

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Solution

The fourth proportional to 13,386.20, 20,071.20 and 5,989.28 is: 8,980.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,386.20 : 20,071.20 = 5,989.28 : x
  2. Step 2: Convert to fraction form
    13,386.20/20,071.20 = 5,989.28/x
  3. Step 3: Cross multiply
    13,386.20x = 20,071.20 × 5,989.28
  4. Step 4: Simplify right side
    13,386.20x = 120,212,036.74
  5. Step 5: Solve for x
    x = 120,212,036.74/13,386.20
  6. Step 6: Final answer
    x = 8,980.30

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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.