Home / 15,290.66-21,081.58-9,903.58

Finding the Fourth Proportional to 15,290.66, 21,081.58 and 9,903.58

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Solution

The fourth proportional to 15,290.66, 21,081.58 and 9,903.58 is: 13,654.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,290.66 : 21,081.58 = 9,903.58 : x
  2. Step 2: Convert to fraction form
    15,290.66/21,081.58 = 9,903.58/x
  3. Step 3: Cross multiply
    15,290.66x = 21,081.58 × 9,903.58
  4. Step 4: Simplify right side
    15,290.66x = 208,783,036.59
  5. Step 5: Solve for x
    x = 208,783,036.59/15,290.66
  6. Step 6: Final answer
    x = 13,654.29

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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.