Home / 14,139.29-21,212.43-9,987.40

Finding the Fourth Proportional to 14,139.29, 21,212.43 and 9,987.40

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Solution

The fourth proportional to 14,139.29, 21,212.43 and 9,987.40 is: 14,983.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,139.29 : 21,212.43 = 9,987.40 : x
  2. Step 2: Convert to fraction form
    14,139.29/21,212.43 = 9,987.40/x
  3. Step 3: Cross multiply
    14,139.29x = 21,212.43 × 9,987.40
  4. Step 4: Simplify right side
    14,139.29x = 211,857,023.38
  5. Step 5: Solve for x
    x = 211,857,023.38/14,139.29
  6. Step 6: Final answer
    x = 14,983.57

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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.