Home / 15,685.09-21,646.80-8,612.89

Finding the Fourth Proportional to 15,685.09, 21,646.80 and 8,612.89

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Solution

The fourth proportional to 15,685.09, 21,646.80 and 8,612.89 is: 11,886.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685.09 : 21,646.80 = 8,612.89 : x
  2. Step 2: Convert to fraction form
    15,685.09/21,646.80 = 8,612.89/x
  3. Step 3: Cross multiply
    15,685.09x = 21,646.80 × 8,612.89
  4. Step 4: Simplify right side
    15,685.09x = 186,441,507.25
  5. Step 5: Solve for x
    x = 186,441,507.25/15,685.09
  6. Step 6: Final answer
    x = 11,886.54

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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.