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Finding the Fourth Proportional to 35,619.20, 53,428.80 and 19,872.80

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Solution

The fourth proportional to 35,619.20, 53,428.80 and 19,872.80 is: 29,809.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,619.20 : 53,428.80 = 19,872.80 : x
  2. Step 2: Convert to fraction form
    35,619.20/53,428.80 = 19,872.80/x
  3. Step 3: Cross multiply
    35,619.20x = 53,428.80 × 19,872.80
  4. Step 4: Simplify right side
    35,619.20x = 1,061,779,856.64
  5. Step 5: Solve for x
    x = 1,061,779,856.64/35,619.20
  6. Step 6: Final answer
    x = 29,809.20

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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.