Home / 19,930.64-27,503.68-10,978.10

Finding the Fourth Proportional to 19,930.64, 27,503.68 and 10,978.10

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Solution

The fourth proportional to 19,930.64, 27,503.68 and 10,978.10 is: 15,149.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,930.64 : 27,503.68 = 10,978.10 : x
  2. Step 2: Convert to fraction form
    19,930.64/27,503.68 = 10,978.10/x
  3. Step 3: Cross multiply
    19,930.64x = 27,503.68 × 10,978.10
  4. Step 4: Simplify right side
    19,930.64x = 301,938,149.41
  5. Step 5: Solve for x
    x = 301,938,149.41/19,930.64
  6. Step 6: Final answer
    x = 15,149.45

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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.