Home / 21,155.84-29,208.32-13,615.26

Finding the Fourth Proportional to 21,155.84, 29,208.32 and 13,615.26

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Solution

The fourth proportional to 21,155.84, 29,208.32 and 13,615.26 is: 18,797.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.84 : 29,208.32 = 13,615.26 : x
  2. Step 2: Convert to fraction form
    21,155.84/29,208.32 = 13,615.26/x
  3. Step 3: Cross multiply
    21,155.84x = 29,208.32 × 13,615.26
  4. Step 4: Simplify right side
    21,155.84x = 397,678,870.96
  5. Step 5: Solve for x
    x = 397,678,870.96/21,155.84
  6. Step 6: Final answer
    x = 18,797.60

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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.