Home / 15,870.40-21,893.79-11,157.46

Finding the Fourth Proportional to 15,870.40, 21,893.79 and 11,157.46

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Solution

The fourth proportional to 15,870.40, 21,893.79 and 11,157.46 is: 15,392.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,870.40 : 21,893.79 = 11,157.46 : x
  2. Step 2: Convert to fraction form
    15,870.40/21,893.79 = 11,157.46/x
  3. Step 3: Cross multiply
    15,870.40x = 21,893.79 × 11,157.46
  4. Step 4: Simplify right side
    15,870.40x = 244,279,086.17
  5. Step 5: Solve for x
    x = 244,279,086.17/15,870.40
  6. Step 6: Final answer
    x = 15,392.12

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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.