Home / 21,078.32-29,088.04-12,125.60

Finding the Fourth Proportional to 21,078.32, 29,088.04 and 12,125.60

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Solution

The fourth proportional to 21,078.32, 29,088.04 and 12,125.60 is: 16,733.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.32 : 29,088.04 = 12,125.60 : x
  2. Step 2: Convert to fraction form
    21,078.32/29,088.04 = 12,125.60/x
  3. Step 3: Cross multiply
    21,078.32x = 29,088.04 × 12,125.60
  4. Step 4: Simplify right side
    21,078.32x = 352,709,937.82
  5. Step 5: Solve for x
    x = 352,709,937.82/21,078.32
  6. Step 6: Final answer
    x = 16,733.30

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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.