Home / 10,851.32-14,965.90-9,120.08

Finding the Fourth Proportional to 10,851.32, 14,965.90 and 9,120.08

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Solution

The fourth proportional to 10,851.32, 14,965.90 and 9,120.08 is: 12,578.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,851.32 : 14,965.90 = 9,120.08 : x
  2. Step 2: Convert to fraction form
    10,851.32/14,965.90 = 9,120.08/x
  3. Step 3: Cross multiply
    10,851.32x = 14,965.90 × 9,120.08
  4. Step 4: Simplify right side
    10,851.32x = 136,490,219.89
  5. Step 5: Solve for x
    x = 136,490,219.89/10,851.32
  6. Step 6: Final answer
    x = 12,578.21

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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.