Home / 15,707.68-21,688.07-10,919.64

Finding the Fourth Proportional to 15,707.68, 21,688.07 and 10,919.64

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Solution

The fourth proportional to 15,707.68, 21,688.07 and 10,919.64 is: 15,077.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,707.68 : 21,688.07 = 10,919.64 : x
  2. Step 2: Convert to fraction form
    15,707.68/21,688.07 = 10,919.64/x
  3. Step 3: Cross multiply
    15,707.68x = 21,688.07 × 10,919.64
  4. Step 4: Simplify right side
    15,707.68x = 236,825,862.47
  5. Step 5: Solve for x
    x = 236,825,862.47/15,707.68
  6. Step 6: Final answer
    x = 15,077.07

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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.