Home / 15,929.68-21,975.90-9,640.84

Finding the Fourth Proportional to 15,929.68, 21,975.90 and 9,640.84

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Solution

The fourth proportional to 15,929.68, 21,975.90 and 9,640.84 is: 13,300.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,929.68 : 21,975.90 = 9,640.84 : x
  2. Step 2: Convert to fraction form
    15,929.68/21,975.90 = 9,640.84/x
  3. Step 3: Cross multiply
    15,929.68x = 21,975.90 × 9,640.84
  4. Step 4: Simplify right side
    15,929.68x = 211,866,135.76
  5. Step 5: Solve for x
    x = 211,866,135.76/15,929.68
  6. Step 6: Final answer
    x = 13,300.09

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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.