Home / 15,307.25-21,122.69-9,340.79

Finding the Fourth Proportional to 15,307.25, 21,122.69 and 9,340.79

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Solution

The fourth proportional to 15,307.25, 21,122.69 and 9,340.79 is: 12,889.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,307.25 : 21,122.69 = 9,340.79 : x
  2. Step 2: Convert to fraction form
    15,307.25/21,122.69 = 9,340.79/x
  3. Step 3: Cross multiply
    15,307.25x = 21,122.69 × 9,340.79
  4. Step 4: Simplify right side
    15,307.25x = 197,302,459.21
  5. Step 5: Solve for x
    x = 197,302,459.21/15,307.25
  6. Step 6: Final answer
    x = 12,889.48

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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.