Home / 13,220.74-18,246.14-7,915.56

Finding the Fourth Proportional to 13,220.74, 18,246.14 and 7,915.56

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Solution

The fourth proportional to 13,220.74, 18,246.14 and 7,915.56 is: 10,924.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.74 : 18,246.14 = 7,915.56 : x
  2. Step 2: Convert to fraction form
    13,220.74/18,246.14 = 7,915.56/x
  3. Step 3: Cross multiply
    13,220.74x = 18,246.14 × 7,915.56
  4. Step 4: Simplify right side
    13,220.74x = 144,428,415.94
  5. Step 5: Solve for x
    x = 144,428,415.94/13,220.74
  6. Step 6: Final answer
    x = 10,924.38

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Half scale
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Double scale
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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.