Home / 15,680.70-21,638.56-9,307.56

Finding the Fourth Proportional to 15,680.70, 21,638.56 and 9,307.56

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Solution

The fourth proportional to 15,680.70, 21,638.56 and 9,307.56 is: 12,843.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,680.70 : 21,638.56 = 9,307.56 : x
  2. Step 2: Convert to fraction form
    15,680.70/21,638.56 = 9,307.56/x
  3. Step 3: Cross multiply
    15,680.70x = 21,638.56 × 9,307.56
  4. Step 4: Simplify right side
    15,680.70x = 201,402,195.51
  5. Step 5: Solve for x
    x = 201,402,195.51/15,680.70
  6. Step 6: Final answer
    x = 12,843.95

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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.