Home / 19,970.07-29,955.87-5,178.60

Finding the Fourth Proportional to 19,970.07, 29,955.87 and 5,178.60

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Solution

The fourth proportional to 19,970.07, 29,955.87 and 5,178.60 is: 7,768.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,970.07 : 29,955.87 = 5,178.60 : x
  2. Step 2: Convert to fraction form
    19,970.07/29,955.87 = 5,178.60/x
  3. Step 3: Cross multiply
    19,970.07x = 29,955.87 × 5,178.60
  4. Step 4: Simplify right side
    19,970.07x = 155,129,468.38
  5. Step 5: Solve for x
    x = 155,129,468.38/19,970.07
  6. Step 6: Final answer
    x = 7,768.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.