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Finding the Fourth Proportional to 19,201.80, 28,802.70 and 15,921.30

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Solution

The fourth proportional to 19,201.80, 28,802.70 and 15,921.30 is: 23,881.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,201.80 : 28,802.70 = 15,921.30 : x
  2. Step 2: Convert to fraction form
    19,201.80/28,802.70 = 15,921.30/x
  3. Step 3: Cross multiply
    19,201.80x = 28,802.70 × 15,921.30
  4. Step 4: Simplify right side
    19,201.80x = 458,576,427.51
  5. Step 5: Solve for x
    x = 458,576,427.51/19,201.80
  6. Step 6: Final answer
    x = 23,881.95

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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.