Home / 19,931.30-27,505.38-10,978.84

Finding the Fourth Proportional to 19,931.30, 27,505.38 and 10,978.84

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Solution

The fourth proportional to 19,931.30, 27,505.38 and 10,978.84 is: 15,150.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931.30 : 27,505.38 = 10,978.84 : x
  2. Step 2: Convert to fraction form
    19,931.30/27,505.38 = 10,978.84/x
  3. Step 3: Cross multiply
    19,931.30x = 27,505.38 × 10,978.84
  4. Step 4: Simplify right side
    19,931.30x = 301,977,166.16
  5. Step 5: Solve for x
    x = 301,977,166.16/19,931.30
  6. Step 6: Final answer
    x = 15,150.90

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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.