Home / 51,386.77-70,912.25-28,725.80

Finding the Fourth Proportional to 51,386.77, 70,912.25 and 28,725.80

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Solution

The fourth proportional to 51,386.77, 70,912.25 and 28,725.80 is: 39,640.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,386.77 : 70,912.25 = 28,725.80 : x
  2. Step 2: Convert to fraction form
    51,386.77/70,912.25 = 28,725.80/x
  3. Step 3: Cross multiply
    51,386.77x = 70,912.25 × 28,725.80
  4. Step 4: Simplify right side
    51,386.77x = 2,037,011,111.05
  5. Step 5: Solve for x
    x = 2,037,011,111.05/51,386.77
  6. Step 6: Final answer
    x = 39,640.77

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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.