Home / 15,307.13-21,126.75-9,992.72

Finding the Fourth Proportional to 15,307.13, 21,126.75 and 9,992.72

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Solution

The fourth proportional to 15,307.13, 21,126.75 and 9,992.72 is: 13,791.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,307.13 : 21,126.75 = 9,992.72 : x
  2. Step 2: Convert to fraction form
    15,307.13/21,126.75 = 9,992.72/x
  3. Step 3: Cross multiply
    15,307.13x = 21,126.75 × 9,992.72
  4. Step 4: Simplify right side
    15,307.13x = 211,113,697.26
  5. Step 5: Solve for x
    x = 211,113,697.26/15,307.13
  6. Step 6: Final answer
    x = 13,791.85

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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.