Home / 21,931.09-30,264.93-11,859.55

Finding the Fourth Proportional to 21,931.09, 30,264.93 and 11,859.55

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Solution

The fourth proportional to 21,931.09, 30,264.93 and 11,859.55 is: 16,366.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.09 : 30,264.93 = 11,859.55 : x
  2. Step 2: Convert to fraction form
    21,931.09/30,264.93 = 11,859.55/x
  3. Step 3: Cross multiply
    21,931.09x = 30,264.93 × 11,859.55
  4. Step 4: Simplify right side
    21,931.09x = 358,928,374.92
  5. Step 5: Solve for x
    x = 358,928,374.92/21,931.09
  6. Step 6: Final answer
    x = 16,366.19

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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.