Home / 13,428.16-20,122.79-7,572.32

Finding the Fourth Proportional to 13,428.16, 20,122.79 and 7,572.32

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Solution

The fourth proportional to 13,428.16, 20,122.79 and 7,572.32 is: 11,347.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.16 : 20,122.79 = 7,572.32 : x
  2. Step 2: Convert to fraction form
    13,428.16/20,122.79 = 7,572.32/x
  3. Step 3: Cross multiply
    13,428.16x = 20,122.79 × 7,572.32
  4. Step 4: Simplify right side
    13,428.16x = 152,376,205.17
  5. Step 5: Solve for x
    x = 152,376,205.17/13,428.16
  6. Step 6: Final answer
    x = 11,347.51

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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.