Home / 18,712.90-28,070.70-11,301.40

Finding the Fourth Proportional to 18,712.90, 28,070.70 and 11,301.40

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Solution

The fourth proportional to 18,712.90, 28,070.70 and 11,301.40 is: 16,952.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.90 : 28,070.70 = 11,301.40 : x
  2. Step 2: Convert to fraction form
    18,712.90/28,070.70 = 11,301.40/x
  3. Step 3: Cross multiply
    18,712.90x = 28,070.70 × 11,301.40
  4. Step 4: Simplify right side
    18,712.90x = 317,238,208.98
  5. Step 5: Solve for x
    x = 317,238,208.98/18,712.90
  6. Step 6: Final answer
    x = 16,952.92

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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.