Home / 15,635.36-21,577.48-8,920.64

Finding the Fourth Proportional to 15,635.36, 21,577.48 and 8,920.64

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Solution

The fourth proportional to 15,635.36, 21,577.48 and 8,920.64 is: 12,310.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,635.36 : 21,577.48 = 8,920.64 : x
  2. Step 2: Convert to fraction form
    15,635.36/21,577.48 = 8,920.64/x
  3. Step 3: Cross multiply
    15,635.36x = 21,577.48 × 8,920.64
  4. Step 4: Simplify right side
    15,635.36x = 192,484,931.19
  5. Step 5: Solve for x
    x = 192,484,931.19/15,635.36
  6. Step 6: Final answer
    x = 12,310.87

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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.