Home / 21,521.16-29,697.84-12,571.20

Finding the Fourth Proportional to 21,521.16, 29,697.84 and 12,571.20

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Solution

The fourth proportional to 21,521.16, 29,697.84 and 12,571.20 is: 17,347.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.16 : 29,697.84 = 12,571.20 : x
  2. Step 2: Convert to fraction form
    21,521.16/29,697.84 = 12,571.20/x
  3. Step 3: Cross multiply
    21,521.16x = 29,697.84 × 12,571.20
  4. Step 4: Simplify right side
    21,521.16x = 373,337,486.21
  5. Step 5: Solve for x
    x = 373,337,486.21/21,521.16
  6. Step 6: Final answer
    x = 17,347.46

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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.