Home / 21,329.76-31,966.32-11,332.40

Finding the Fourth Proportional to 21,329.76, 31,966.32 and 11,332.40

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Solution

The fourth proportional to 21,329.76, 31,966.32 and 11,332.40 is: 16,983.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.76 : 31,966.32 = 11,332.40 : x
  2. Step 2: Convert to fraction form
    21,329.76/31,966.32 = 11,332.40/x
  3. Step 3: Cross multiply
    21,329.76x = 31,966.32 × 11,332.40
  4. Step 4: Simplify right side
    21,329.76x = 362,255,124.77
  5. Step 5: Solve for x
    x = 362,255,124.77/21,329.76
  6. Step 6: Final answer
    x = 16,983.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.