Home / 21,071.99-31,612.68-7,924.47

Finding the Fourth Proportional to 21,071.99, 31,612.68 and 7,924.47

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Solution

The fourth proportional to 21,071.99, 31,612.68 and 7,924.47 is: 11,888.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.99 : 31,612.68 = 7,924.47 : x
  2. Step 2: Convert to fraction form
    21,071.99/31,612.68 = 7,924.47/x
  3. Step 3: Cross multiply
    21,071.99x = 31,612.68 × 7,924.47
  4. Step 4: Simplify right side
    21,071.99x = 250,513,734.28
  5. Step 5: Solve for x
    x = 250,513,734.28/21,071.99
  6. Step 6: Final answer
    x = 11,888.47

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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.