Home / 21,780.14-32,656.16-9,308.30

Finding the Fourth Proportional to 21,780.14, 32,656.16 and 9,308.30

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Solution

The fourth proportional to 21,780.14, 32,656.16 and 9,308.30 is: 13,956.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.14 : 32,656.16 = 9,308.30 : x
  2. Step 2: Convert to fraction form
    21,780.14/32,656.16 = 9,308.30/x
  3. Step 3: Cross multiply
    21,780.14x = 32,656.16 × 9,308.30
  4. Step 4: Simplify right side
    21,780.14x = 303,973,334.13
  5. Step 5: Solve for x
    x = 303,973,334.13/21,780.14
  6. Step 6: Final answer
    x = 13,956.45

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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.