Home / 15,509.65-21,408.16-8,799.75

Finding the Fourth Proportional to 15,509.65, 21,408.16 and 8,799.75

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Solution

The fourth proportional to 15,509.65, 21,408.16 and 8,799.75 is: 12,146.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.65 : 21,408.16 = 8,799.75 : x
  2. Step 2: Convert to fraction form
    15,509.65/21,408.16 = 8,799.75/x
  3. Step 3: Cross multiply
    15,509.65x = 21,408.16 × 8,799.75
  4. Step 4: Simplify right side
    15,509.65x = 188,386,455.96
  5. Step 5: Solve for x
    x = 188,386,455.96/15,509.65
  6. Step 6: Final answer
    x = 12,146.40

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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.