Home / 15,931.36-21,985.38-8,857.84

Finding the Fourth Proportional to 15,931.36, 21,985.38 and 8,857.84

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Solution

The fourth proportional to 15,931.36, 21,985.38 and 8,857.84 is: 12,223.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,931.36 : 21,985.38 = 8,857.84 : x
  2. Step 2: Convert to fraction form
    15,931.36/21,985.38 = 8,857.84/x
  3. Step 3: Cross multiply
    15,931.36x = 21,985.38 × 8,857.84
  4. Step 4: Simplify right side
    15,931.36x = 194,742,978.38
  5. Step 5: Solve for x
    x = 194,742,978.38/15,931.36
  6. Step 6: Final answer
    x = 12,223.88

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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.