Home / 30,965.60-42,728.64-25,639.04

Finding the Fourth Proportional to 30,965.60, 42,728.64 and 25,639.04

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Solution

The fourth proportional to 30,965.60, 42,728.64 and 25,639.04 is: 35,378.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,965.60 : 42,728.64 = 25,639.04 : x
  2. Step 2: Convert to fraction form
    30,965.60/42,728.64 = 25,639.04/x
  3. Step 3: Cross multiply
    30,965.60x = 42,728.64 × 25,639.04
  4. Step 4: Simplify right side
    30,965.60x = 1,095,521,310.11
  5. Step 5: Solve for x
    x = 1,095,521,310.11/30,965.60
  6. Step 6: Final answer
    x = 35,378.66

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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.