Home / 15,320.58-21,129.69-12,936.07

Finding the Fourth Proportional to 15,320.58, 21,129.69 and 12,936.07

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Solution

The fourth proportional to 15,320.58, 21,129.69 and 12,936.07 is: 17,841.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320.58 : 21,129.69 = 12,936.07 : x
  2. Step 2: Convert to fraction form
    15,320.58/21,129.69 = 12,936.07/x
  3. Step 3: Cross multiply
    15,320.58x = 21,129.69 × 12,936.07
  4. Step 4: Simplify right side
    15,320.58x = 273,335,223.84
  5. Step 5: Solve for x
    x = 273,335,223.84/15,320.58
  6. Step 6: Final answer
    x = 17,841.05

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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.