Home / 9,421.11-13,001.28-5,172.56

Finding the Fourth Proportional to 9,421.11, 13,001.28 and 5,172.56

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Solution

The fourth proportional to 9,421.11, 13,001.28 and 5,172.56 is: 7,138.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,421.11 : 13,001.28 = 5,172.56 : x
  2. Step 2: Convert to fraction form
    9,421.11/13,001.28 = 5,172.56/x
  3. Step 3: Cross multiply
    9,421.11x = 13,001.28 × 5,172.56
  4. Step 4: Simplify right side
    9,421.11x = 67,249,860.31
  5. Step 5: Solve for x
    x = 67,249,860.31/9,421.11
  6. Step 6: Final answer
    x = 7,138.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.