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Finding the Fourth Proportional to 25,820.80, 35,601.60 and 19,859.20

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Solution

The fourth proportional to 25,820.80, 35,601.60 and 19,859.20 is: 27,381.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,820.80 : 35,601.60 = 19,859.20 : x
  2. Step 2: Convert to fraction form
    25,820.80/35,601.60 = 19,859.20/x
  3. Step 3: Cross multiply
    25,820.80x = 35,601.60 × 19,859.20
  4. Step 4: Simplify right side
    25,820.80x = 707,019,294.72
  5. Step 5: Solve for x
    x = 707,019,294.72/25,820.80
  6. Step 6: Final answer
    x = 27,381.77

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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.