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Finding the Fourth Proportional to 19,955.40, 29,957.40 and 10,089.60

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Solution

The fourth proportional to 19,955.40, 29,957.40 and 10,089.60 is: 15,146.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,955.40 : 29,957.40 = 10,089.60 : x
  2. Step 2: Convert to fraction form
    19,955.40/29,957.40 = 10,089.60/x
  3. Step 3: Cross multiply
    19,955.40x = 29,957.40 × 10,089.60
  4. Step 4: Simplify right side
    19,955.40x = 302,258,183.04
  5. Step 5: Solve for x
    x = 302,258,183.04/19,955.40
  6. Step 6: Final answer
    x = 15,146.69

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1.5x scale

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.