Home / 21,789.64-32,670.40-9,317.80

Finding the Fourth Proportional to 21,789.64, 32,670.40 and 9,317.80

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Solution

The fourth proportional to 21,789.64, 32,670.40 and 9,317.80 is: 13,970.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,789.64 : 32,670.40 = 9,317.80 : x
  2. Step 2: Convert to fraction form
    21,789.64/32,670.40 = 9,317.80/x
  3. Step 3: Cross multiply
    21,789.64x = 32,670.40 × 9,317.80
  4. Step 4: Simplify right side
    21,789.64x = 304,416,253.12
  5. Step 5: Solve for x
    x = 304,416,253.12/21,789.64
  6. Step 6: Final answer
    x = 13,970.69

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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.