Home / 19,128.80-28,685.10-9,271.10

Finding the Fourth Proportional to 19,128.80, 28,685.10 and 9,271.10

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Solution

The fourth proportional to 19,128.80, 28,685.10 and 9,271.10 is: 13,902.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,128.80 : 28,685.10 = 9,271.10 : x
  2. Step 2: Convert to fraction form
    19,128.80/28,685.10 = 9,271.10/x
  3. Step 3: Cross multiply
    19,128.80x = 28,685.10 × 9,271.10
  4. Step 4: Simplify right side
    19,128.80x = 265,942,430.61
  5. Step 5: Solve for x
    x = 265,942,430.61/19,128.80
  6. Step 6: Final answer
    x = 13,902.72

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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.