Home / 15,357.54-21,193.38-8,643.21

Finding the Fourth Proportional to 15,357.54, 21,193.38 and 8,643.21

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Solution

The fourth proportional to 15,357.54, 21,193.38 and 8,643.21 is: 11,927.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,357.54 : 21,193.38 = 8,643.21 : x
  2. Step 2: Convert to fraction form
    15,357.54/21,193.38 = 8,643.21/x
  3. Step 3: Cross multiply
    15,357.54x = 21,193.38 × 8,643.21
  4. Step 4: Simplify right side
    15,357.54x = 183,178,886.93
  5. Step 5: Solve for x
    x = 183,178,886.93/15,357.54
  6. Step 6: Final answer
    x = 11,927.62

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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.