Home / 12,988.10-19,474.03-5,487.80

Finding the Fourth Proportional to 12,988.10, 19,474.03 and 5,487.80

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Solution

The fourth proportional to 12,988.10, 19,474.03 and 5,487.80 is: 8,228.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.10 : 19,474.03 = 5,487.80 : x
  2. Step 2: Convert to fraction form
    12,988.10/19,474.03 = 5,487.80/x
  3. Step 3: Cross multiply
    12,988.10x = 19,474.03 × 5,487.80
  4. Step 4: Simplify right side
    12,988.10x = 106,869,554.40
  5. Step 5: Solve for x
    x = 106,869,554.40/12,988.10
  6. Step 6: Final answer
    x = 8,228.27

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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.