Home / 15,456.68-21,322.32-9,781.84

Finding the Fourth Proportional to 15,456.68, 21,322.32 and 9,781.84

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Solution

The fourth proportional to 15,456.68, 21,322.32 and 9,781.84 is: 13,493.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,456.68 : 21,322.32 = 9,781.84 : x
  2. Step 2: Convert to fraction form
    15,456.68/21,322.32 = 9,781.84/x
  3. Step 3: Cross multiply
    15,456.68x = 21,322.32 × 9,781.84
  4. Step 4: Simplify right side
    15,456.68x = 208,571,522.67
  5. Step 5: Solve for x
    x = 208,571,522.67/15,456.68
  6. Step 6: Final answer
    x = 13,493.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.