Home / 21,081.35-31,619.28-9,995.08

Finding the Fourth Proportional to 21,081.35, 31,619.28 and 9,995.08

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Solution

The fourth proportional to 21,081.35, 31,619.28 and 9,995.08 is: 14,991.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.35 : 31,619.28 = 9,995.08 : x
  2. Step 2: Convert to fraction form
    21,081.35/31,619.28 = 9,995.08/x
  3. Step 3: Cross multiply
    21,081.35x = 31,619.28 × 9,995.08
  4. Step 4: Simplify right side
    21,081.35x = 316,037,136.37
  5. Step 5: Solve for x
    x = 316,037,136.37/21,081.35
  6. Step 6: Final answer
    x = 14,991.32

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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.