Home / 21,435.28-29,580.38-11,875.16

Finding the Fourth Proportional to 21,435.28, 29,580.38 and 11,875.16

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Solution

The fourth proportional to 21,435.28, 29,580.38 and 11,875.16 is: 16,387.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,435.28 : 29,580.38 = 11,875.16 : x
  2. Step 2: Convert to fraction form
    21,435.28/29,580.38 = 11,875.16/x
  3. Step 3: Cross multiply
    21,435.28x = 29,580.38 × 11,875.16
  4. Step 4: Simplify right side
    21,435.28x = 351,271,745.36
  5. Step 5: Solve for x
    x = 351,271,745.36/21,435.28
  6. Step 6: Final answer
    x = 16,387.55

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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.