Home / 15,383.16-21,228.75-8,670.42

Finding the Fourth Proportional to 15,383.16, 21,228.75 and 8,670.42

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Solution

The fourth proportional to 15,383.16, 21,228.75 and 8,670.42 is: 11,965.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,383.16 : 21,228.75 = 8,670.42 : x
  2. Step 2: Convert to fraction form
    15,383.16/21,228.75 = 8,670.42/x
  3. Step 3: Cross multiply
    15,383.16x = 21,228.75 × 8,670.42
  4. Step 4: Simplify right side
    15,383.16x = 184,062,178.58
  5. Step 5: Solve for x
    x = 184,062,178.58/15,383.16
  6. Step 6: Final answer
    x = 11,965.17

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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.