Home / 15,317.56-21,138.60-8,603.20

Finding the Fourth Proportional to 15,317.56, 21,138.60 and 8,603.20

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Solution

The fourth proportional to 15,317.56, 21,138.60 and 8,603.20 is: 11,872.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,317.56 : 21,138.60 = 8,603.20 : x
  2. Step 2: Convert to fraction form
    15,317.56/21,138.60 = 8,603.20/x
  3. Step 3: Cross multiply
    15,317.56x = 21,138.60 × 8,603.20
  4. Step 4: Simplify right side
    15,317.56x = 181,859,603.52
  5. Step 5: Solve for x
    x = 181,859,603.52/15,317.56
  6. Step 6: Final answer
    x = 11,872.62

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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.