Home / 15,712.83-21,667.64-10,405.71

Finding the Fourth Proportional to 15,712.83, 21,667.64 and 10,405.71

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Solution

The fourth proportional to 15,712.83, 21,667.64 and 10,405.71 is: 14,349.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,712.83 : 21,667.64 = 10,405.71 : x
  2. Step 2: Convert to fraction form
    15,712.83/21,667.64 = 10,405.71/x
  3. Step 3: Cross multiply
    15,712.83x = 21,667.64 × 10,405.71
  4. Step 4: Simplify right side
    15,712.83x = 225,467,126.20
  5. Step 5: Solve for x
    x = 225,467,126.20/15,712.83
  6. Step 6: Final answer
    x = 14,349.24

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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.