Home / 13,428.74-18,531.60-8,122.01

Finding the Fourth Proportional to 13,428.74, 18,531.60 and 8,122.01

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Solution

The fourth proportional to 13,428.74, 18,531.60 and 8,122.01 is: 11,208.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.74 : 18,531.60 = 8,122.01 : x
  2. Step 2: Convert to fraction form
    13,428.74/18,531.60 = 8,122.01/x
  3. Step 3: Cross multiply
    13,428.74x = 18,531.60 × 8,122.01
  4. Step 4: Simplify right side
    13,428.74x = 150,513,840.52
  5. Step 5: Solve for x
    x = 150,513,840.52/13,428.74
  6. Step 6: Final answer
    x = 11,208.34

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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.