Home / 15,783.14-21,780.69-9,069.26

Finding the Fourth Proportional to 15,783.14, 21,780.69 and 9,069.26

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Solution

The fourth proportional to 15,783.14, 21,780.69 and 9,069.26 is: 12,515.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,783.14 : 21,780.69 = 9,069.26 : x
  2. Step 2: Convert to fraction form
    15,783.14/21,780.69 = 9,069.26/x
  3. Step 3: Cross multiply
    15,783.14x = 21,780.69 × 9,069.26
  4. Step 4: Simplify right side
    15,783.14x = 197,534,631.69
  5. Step 5: Solve for x
    x = 197,534,631.69/15,783.14
  6. Step 6: Final answer
    x = 12,515.55

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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.