Home / 15,665.40-21,617.97-8,859.32

Finding the Fourth Proportional to 15,665.40, 21,617.97 and 8,859.32

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Solution

The fourth proportional to 15,665.40, 21,617.97 and 8,859.32 is: 12,225.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,665.40 : 21,617.97 = 8,859.32 : x
  2. Step 2: Convert to fraction form
    15,665.40/21,617.97 = 8,859.32/x
  3. Step 3: Cross multiply
    15,665.40x = 21,617.97 × 8,859.32
  4. Step 4: Simplify right side
    15,665.40x = 191,520,405.89
  5. Step 5: Solve for x
    x = 191,520,405.89/15,665.40
  6. Step 6: Final answer
    x = 12,225.70

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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.