Home / 21,529.36-29,705.28-12,571.76

Finding the Fourth Proportional to 21,529.36, 29,705.28 and 12,571.76

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Solution

The fourth proportional to 21,529.36, 29,705.28 and 12,571.76 is: 17,345.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,529.36 : 29,705.28 = 12,571.76 : x
  2. Step 2: Convert to fraction form
    21,529.36/29,705.28 = 12,571.76/x
  3. Step 3: Cross multiply
    21,529.36x = 29,705.28 × 12,571.76
  4. Step 4: Simplify right side
    21,529.36x = 373,447,650.89
  5. Step 5: Solve for x
    x = 373,447,650.89/21,529.36
  6. Step 6: Final answer
    x = 17,345.97

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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.