Home / 21,024.21-29,015.46-15,709.80

Finding the Fourth Proportional to 21,024.21, 29,015.46 and 15,709.80

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Solution

The fourth proportional to 21,024.21, 29,015.46 and 15,709.80 is: 21,681.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,024.21 : 29,015.46 = 15,709.80 : x
  2. Step 2: Convert to fraction form
    21,024.21/29,015.46 = 15,709.80/x
  3. Step 3: Cross multiply
    21,024.21x = 29,015.46 × 15,709.80
  4. Step 4: Simplify right side
    21,024.21x = 455,827,073.51
  5. Step 5: Solve for x
    x = 455,827,073.51/21,024.21
  6. Step 6: Final answer
    x = 21,681.06

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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.