Home / 21,523.84-29,697.60-13,137.28

Finding the Fourth Proportional to 21,523.84, 29,697.60 and 13,137.28

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Solution

The fourth proportional to 21,523.84, 29,697.60 and 13,137.28 is: 18,126.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,523.84 : 29,697.60 = 13,137.28 : x
  2. Step 2: Convert to fraction form
    21,523.84/29,697.60 = 13,137.28/x
  3. Step 3: Cross multiply
    21,523.84x = 29,697.60 × 13,137.28
  4. Step 4: Simplify right side
    21,523.84x = 390,145,686.53
  5. Step 5: Solve for x
    x = 390,145,686.53/21,523.84
  6. Step 6: Final answer
    x = 18,126.21

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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.