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Finding the Fourth Proportional to 30,652.80, 45,979.20 and 13,124.40

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Solution

The fourth proportional to 30,652.80, 45,979.20 and 13,124.40 is: 19,686.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,652.80 : 45,979.20 = 13,124.40 : x
  2. Step 2: Convert to fraction form
    30,652.80/45,979.20 = 13,124.40/x
  3. Step 3: Cross multiply
    30,652.80x = 45,979.20 × 13,124.40
  4. Step 4: Simplify right side
    30,652.80x = 603,449,412.48
  5. Step 5: Solve for x
    x = 603,449,412.48/30,652.80
  6. Step 6: Final answer
    x = 19,686.60

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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.