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Finding the Fourth Proportional to 51,278.40, 76,925.52 and 21,696.40

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Solution

The fourth proportional to 51,278.40, 76,925.52 and 21,696.40 is: 32,547.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,278.40 : 76,925.52 = 21,696.40 : x
  2. Step 2: Convert to fraction form
    51,278.40/76,925.52 = 21,696.40/x
  3. Step 3: Cross multiply
    51,278.40x = 76,925.52 × 21,696.40
  4. Step 4: Simplify right side
    51,278.40x = 1,669,006,852.13
  5. Step 5: Solve for x
    x = 1,669,006,852.13/51,278.40
  6. Step 6: Final answer
    x = 32,547.95

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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.