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Finding the Fourth Proportional to 51,357.98, 70,869.98 and 28,386.84

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Solution

The fourth proportional to 51,357.98, 70,869.98 and 28,386.84 is: 39,171.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,357.98 : 70,869.98 = 28,386.84 : x
  2. Step 2: Convert to fraction form
    51,357.98/70,869.98 = 28,386.84/x
  3. Step 3: Cross multiply
    51,357.98x = 70,869.98 × 28,386.84
  4. Step 4: Simplify right side
    51,357.98x = 2,011,774,628.04
  5. Step 5: Solve for x
    x = 2,011,774,628.04/51,357.98
  6. Step 6: Final answer
    x = 39,171.61

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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.