Home / 15,289.84-21,097.82-8,918.36

Finding the Fourth Proportional to 15,289.84, 21,097.82 and 8,918.36

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Solution

The fourth proportional to 15,289.84, 21,097.82 and 8,918.36 is: 12,306.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,289.84 : 21,097.82 = 8,918.36 : x
  2. Step 2: Convert to fraction form
    15,289.84/21,097.82 = 8,918.36/x
  3. Step 3: Cross multiply
    15,289.84x = 21,097.82 × 8,918.36
  4. Step 4: Simplify right side
    15,289.84x = 188,157,953.98
  5. Step 5: Solve for x
    x = 188,157,953.98/15,289.84
  6. Step 6: Final answer
    x = 12,306.08

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1.5x scale

Why These Related Problems?

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