Home / 30,288.80-45,411.60-13,635.20

Finding the Fourth Proportional to 30,288.80, 45,411.60 and 13,635.20

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Solution

The fourth proportional to 30,288.80, 45,411.60 and 13,635.20 is: 20,443.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,288.80 : 45,411.60 = 13,635.20 : x
  2. Step 2: Convert to fraction form
    30,288.80/45,411.60 = 13,635.20/x
  3. Step 3: Cross multiply
    30,288.80x = 45,411.60 × 13,635.20
  4. Step 4: Simplify right side
    30,288.80x = 619,196,248.32
  5. Step 5: Solve for x
    x = 619,196,248.32/30,288.80
  6. Step 6: Final answer
    x = 20,443.08

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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.