Home / 20,928.88-28,853.64-17,931.76

Finding the Fourth Proportional to 20,928.88, 28,853.64 and 17,931.76

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Solution

The fourth proportional to 20,928.88, 28,853.64 and 17,931.76 is: 24,721.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.88 : 28,853.64 = 17,931.76 : x
  2. Step 2: Convert to fraction form
    20,928.88/28,853.64 = 17,931.76/x
  3. Step 3: Cross multiply
    20,928.88x = 28,853.64 × 17,931.76
  4. Step 4: Simplify right side
    20,928.88x = 517,396,547.61
  5. Step 5: Solve for x
    x = 517,396,547.61/20,928.88
  6. Step 6: Final answer
    x = 24,721.65

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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.