Home / 13,220.64-18,239.04-8,749.44

Finding the Fourth Proportional to 13,220.64, 18,239.04 and 8,749.44

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Solution

The fourth proportional to 13,220.64, 18,239.04 and 8,749.44 is: 12,070.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.64 : 18,239.04 = 8,749.44 : x
  2. Step 2: Convert to fraction form
    13,220.64/18,239.04 = 8,749.44/x
  3. Step 3: Cross multiply
    13,220.64x = 18,239.04 × 8,749.44
  4. Step 4: Simplify right side
    13,220.64x = 159,581,386.14
  5. Step 5: Solve for x
    x = 159,581,386.14/13,220.64
  6. Step 6: Final answer
    x = 12,070.62

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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.