Home / 21,293.68-29,378.77-12,339.45

Finding the Fourth Proportional to 21,293.68, 29,378.77 and 12,339.45

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Solution

The fourth proportional to 21,293.68, 29,378.77 and 12,339.45 is: 17,024.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,293.68 : 29,378.77 = 12,339.45 : x
  2. Step 2: Convert to fraction form
    21,293.68/29,378.77 = 12,339.45/x
  3. Step 3: Cross multiply
    21,293.68x = 29,378.77 × 12,339.45
  4. Step 4: Simplify right side
    21,293.68x = 362,517,863.48
  5. Step 5: Solve for x
    x = 362,517,863.48/21,293.68
  6. Step 6: Final answer
    x = 17,024.67

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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.