Home / 15,856.43-21,881.75-9,485.78

Finding the Fourth Proportional to 15,856.43, 21,881.75 and 9,485.78

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Solution

The fourth proportional to 15,856.43, 21,881.75 and 9,485.78 is: 13,090.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,856.43 : 21,881.75 = 9,485.78 : x
  2. Step 2: Convert to fraction form
    15,856.43/21,881.75 = 9,485.78/x
  3. Step 3: Cross multiply
    15,856.43x = 21,881.75 × 9,485.78
  4. Step 4: Simplify right side
    15,856.43x = 207,565,309.68
  5. Step 5: Solve for x
    x = 207,565,309.68/15,856.43
  6. Step 6: Final answer
    x = 13,090.30

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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.