Home / 21,156.43-31,703.45-11,783.54

Finding the Fourth Proportional to 21,156.43, 31,703.45 and 11,783.54

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Solution

The fourth proportional to 21,156.43, 31,703.45 and 11,783.54 is: 17,657.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.43 : 31,703.45 = 11,783.54 : x
  2. Step 2: Convert to fraction form
    21,156.43/31,703.45 = 11,783.54/x
  3. Step 3: Cross multiply
    21,156.43x = 31,703.45 × 11,783.54
  4. Step 4: Simplify right side
    21,156.43x = 373,578,653.78
  5. Step 5: Solve for x
    x = 373,578,653.78/21,156.43
  6. Step 6: Final answer
    x = 17,657.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.