Home / 21,336.68-31,985.66-7,478.12

Finding the Fourth Proportional to 21,336.68, 31,985.66 and 7,478.12

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Solution

The fourth proportional to 21,336.68, 31,985.66 and 7,478.12 is: 11,210.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,336.68 : 31,985.66 = 7,478.12 : x
  2. Step 2: Convert to fraction form
    21,336.68/31,985.66 = 7,478.12/x
  3. Step 3: Cross multiply
    21,336.68x = 31,985.66 × 7,478.12
  4. Step 4: Simplify right side
    21,336.68x = 239,192,603.76
  5. Step 5: Solve for x
    x = 239,192,603.76/21,336.68
  6. Step 6: Final answer
    x = 11,210.39

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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.