Home / 15,631.34-21,571.28-8,557.78

Finding the Fourth Proportional to 15,631.34, 21,571.28 and 8,557.78

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Solution

The fourth proportional to 15,631.34, 21,571.28 and 8,557.78 is: 11,809.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,631.34 : 21,571.28 = 8,557.78 : x
  2. Step 2: Convert to fraction form
    15,631.34/21,571.28 = 8,557.78/x
  3. Step 3: Cross multiply
    15,631.34x = 21,571.28 × 8,557.78
  4. Step 4: Simplify right side
    15,631.34x = 184,602,268.56
  5. Step 5: Solve for x
    x = 184,602,268.56/15,631.34
  6. Step 6: Final answer
    x = 11,809.75

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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.