Home / 15,857.19-21,882.89-8,783.58

Finding the Fourth Proportional to 15,857.19, 21,882.89 and 8,783.58

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Solution

The fourth proportional to 15,857.19, 21,882.89 and 8,783.58 is: 12,121.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,857.19 : 21,882.89 = 8,783.58 : x
  2. Step 2: Convert to fraction form
    15,857.19/21,882.89 = 8,783.58/x
  3. Step 3: Cross multiply
    15,857.19x = 21,882.89 × 8,783.58
  4. Step 4: Simplify right side
    15,857.19x = 192,210,071.03
  5. Step 5: Solve for x
    x = 192,210,071.03/15,857.19
  6. Step 6: Final answer
    x = 12,121.32

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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.