Home / 19,931.07-27,503.86-10,978.38

Finding the Fourth Proportional to 19,931.07, 27,503.86 and 10,978.38

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Solution

The fourth proportional to 19,931.07, 27,503.86 and 10,978.38 is: 15,149.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931.07 : 27,503.86 = 10,978.38 : x
  2. Step 2: Convert to fraction form
    19,931.07/27,503.86 = 10,978.38/x
  3. Step 3: Cross multiply
    19,931.07x = 27,503.86 × 10,978.38
  4. Step 4: Simplify right side
    19,931.07x = 301,947,634.14
  5. Step 5: Solve for x
    x = 301,947,634.14/19,931.07
  6. Step 6: Final answer
    x = 15,149.60

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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.