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Finding the Fourth Proportional to 30,279.60, 45,426.60 and 12,740.40

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Solution

The fourth proportional to 30,279.60, 45,426.60 and 12,740.40 is: 19,113.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,279.60 : 45,426.60 = 12,740.40 : x
  2. Step 2: Convert to fraction form
    30,279.60/45,426.60 = 12,740.40/x
  3. Step 3: Cross multiply
    30,279.60x = 45,426.60 × 12,740.40
  4. Step 4: Simplify right side
    30,279.60x = 578,753,054.64
  5. Step 5: Solve for x
    x = 578,753,054.64/30,279.60
  6. Step 6: Final answer
    x = 19,113.63

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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.