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Finding the Fourth Proportional to 30,253.32, 45,384.80 and 12,728.16

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Solution

The fourth proportional to 30,253.32, 45,384.80 and 12,728.16 is: 19,094.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,253.32 : 45,384.80 = 12,728.16 : x
  2. Step 2: Convert to fraction form
    30,253.32/45,384.80 = 12,728.16/x
  3. Step 3: Cross multiply
    30,253.32x = 45,384.80 × 12,728.16
  4. Step 4: Simplify right side
    30,253.32x = 577,664,995.97
  5. Step 5: Solve for x
    x = 577,664,995.97/30,253.32
  6. Step 6: Final answer
    x = 19,094.27

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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.