Home / 15,699.15-21,665.33-8,625.72

Finding the Fourth Proportional to 15,699.15, 21,665.33 and 8,625.72

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Solution

The fourth proportional to 15,699.15, 21,665.33 and 8,625.72 is: 11,903.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,699.15 : 21,665.33 = 8,625.72 : x
  2. Step 2: Convert to fraction form
    15,699.15/21,665.33 = 8,625.72/x
  3. Step 3: Cross multiply
    15,699.15x = 21,665.33 × 8,625.72
  4. Step 4: Simplify right side
    15,699.15x = 186,879,070.29
  5. Step 5: Solve for x
    x = 186,879,070.29/15,699.15
  6. Step 6: Final answer
    x = 11,903.77

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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.