Home / 13,221.51-18,246.25-7,915.30

Finding the Fourth Proportional to 13,221.51, 18,246.25 and 7,915.30

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Solution

The fourth proportional to 13,221.51, 18,246.25 and 7,915.30 is: 10,923.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.51 : 18,246.25 = 7,915.30 : x
  2. Step 2: Convert to fraction form
    13,221.51/18,246.25 = 7,915.30/x
  3. Step 3: Cross multiply
    13,221.51x = 18,246.25 × 7,915.30
  4. Step 4: Simplify right side
    13,221.51x = 144,424,542.63
  5. Step 5: Solve for x
    x = 144,424,542.63/13,221.51
  6. Step 6: Final answer
    x = 10,923.45

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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.