Home / 15,518.16-21,419.64-9,234.72

Finding the Fourth Proportional to 15,518.16, 21,419.64 and 9,234.72

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Solution

The fourth proportional to 15,518.16, 21,419.64 and 9,234.72 is: 12,746.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,518.16 : 21,419.64 = 9,234.72 : x
  2. Step 2: Convert to fraction form
    15,518.16/21,419.64 = 9,234.72/x
  3. Step 3: Cross multiply
    15,518.16x = 21,419.64 × 9,234.72
  4. Step 4: Simplify right side
    15,518.16x = 197,804,377.90
  5. Step 5: Solve for x
    x = 197,804,377.90/15,518.16
  6. Step 6: Final answer
    x = 12,746.64

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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.