Home / 21,631.86-29,835.54-15,683.22

Finding the Fourth Proportional to 21,631.86, 29,835.54 and 15,683.22

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Solution

The fourth proportional to 21,631.86, 29,835.54 and 15,683.22 is: 21,630.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,631.86 : 29,835.54 = 15,683.22 : x
  2. Step 2: Convert to fraction form
    21,631.86/29,835.54 = 15,683.22/x
  3. Step 3: Cross multiply
    21,631.86x = 29,835.54 × 15,683.22
  4. Step 4: Simplify right side
    21,631.86x = 467,917,337.64
  5. Step 5: Solve for x
    x = 467,917,337.64/21,631.86
  6. Step 6: Final answer
    x = 21,630.93

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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.