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Finding the Fourth Proportional to 35,820.80, 53,731.20 and 10,859.60

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Solution

The fourth proportional to 35,820.80, 53,731.20 and 10,859.60 is: 16,289.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,820.80 : 53,731.20 = 10,859.60 : x
  2. Step 2: Convert to fraction form
    35,820.80/53,731.20 = 10,859.60/x
  3. Step 3: Cross multiply
    35,820.80x = 53,731.20 × 10,859.60
  4. Step 4: Simplify right side
    35,820.80x = 583,499,339.52
  5. Step 5: Solve for x
    x = 583,499,339.52/35,820.80
  6. Step 6: Final answer
    x = 16,289.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.