Home / 10,120.05-13,965.12-5,643.63

Finding the Fourth Proportional to 10,120.05, 13,965.12 and 5,643.63

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Solution

The fourth proportional to 10,120.05, 13,965.12 and 5,643.63 is: 7,787.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120.05 : 13,965.12 = 5,643.63 : x
  2. Step 2: Convert to fraction form
    10,120.05/13,965.12 = 5,643.63/x
  3. Step 3: Cross multiply
    10,120.05x = 13,965.12 × 5,643.63
  4. Step 4: Simplify right side
    10,120.05x = 78,813,970.19
  5. Step 5: Solve for x
    x = 78,813,970.19/10,120.05
  6. Step 6: Final answer
    x = 7,787.90

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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.