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Finding the Fourth Proportional to 18,866.40, 26,038.24 and 10,913.28

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Solution

The fourth proportional to 18,866.40, 26,038.24 and 10,913.28 is: 15,061.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.40 : 26,038.24 = 10,913.28 : x
  2. Step 2: Convert to fraction form
    18,866.40/26,038.24 = 10,913.28/x
  3. Step 3: Cross multiply
    18,866.40x = 26,038.24 × 10,913.28
  4. Step 4: Simplify right side
    18,866.40x = 284,162,603.83
  5. Step 5: Solve for x
    x = 284,162,603.83/18,866.40
  6. Step 6: Final answer
    x = 15,061.83

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.