Home / 28,666.40-42,966.59-11,121.39

Finding the Fourth Proportional to 28,666.40, 42,966.59 and 11,121.39

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Solution

The fourth proportional to 28,666.40, 42,966.59 and 11,121.39 is: 16,669.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,666.40 : 42,966.59 = 11,121.39 : x
  2. Step 2: Convert to fraction form
    28,666.40/42,966.59 = 11,121.39/x
  3. Step 3: Cross multiply
    28,666.40x = 42,966.59 × 11,121.39
  4. Step 4: Simplify right side
    28,666.40x = 477,848,148.75
  5. Step 5: Solve for x
    x = 477,848,148.75/28,666.40
  6. Step 6: Final answer
    x = 16,669.28

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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.