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Finding the Fourth Proportional to 12,888.79, 19,333.20 and 3,528.89

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Solution

The fourth proportional to 12,888.79, 19,333.20 and 3,528.89 is: 5,293.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888.79 : 19,333.20 = 3,528.89 : x
  2. Step 2: Convert to fraction form
    12,888.79/19,333.20 = 3,528.89/x
  3. Step 3: Cross multiply
    12,888.79x = 19,333.20 × 3,528.89
  4. Step 4: Simplify right side
    12,888.79x = 68,224,705.36
  5. Step 5: Solve for x
    x = 68,224,705.36/12,888.79
  6. Step 6: Final answer
    x = 5,293.34

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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.