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Finding the Fourth Proportional to 30,443.20, 45,643.20 and 13,811.20

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Solution

The fourth proportional to 30,443.20, 45,643.20 and 13,811.20 is: 20,707.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,443.20 : 45,643.20 = 13,811.20 : x
  2. Step 2: Convert to fraction form
    30,443.20/45,643.20 = 13,811.20/x
  3. Step 3: Cross multiply
    30,443.20x = 45,643.20 × 13,811.20
  4. Step 4: Simplify right side
    30,443.20x = 630,387,363.84
  5. Step 5: Solve for x
    x = 630,387,363.84/30,443.20
  6. Step 6: Final answer
    x = 20,707.00

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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.