Home / 28,688.25-39,578.70-21,152.46

Finding the Fourth Proportional to 28,688.25, 39,578.70 and 21,152.46

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Solution

The fourth proportional to 28,688.25, 39,578.70 and 21,152.46 is: 29,182.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,688.25 : 39,578.70 = 21,152.46 : x
  2. Step 2: Convert to fraction form
    28,688.25/39,578.70 = 21,152.46/x
  3. Step 3: Cross multiply
    28,688.25x = 39,578.70 × 21,152.46
  4. Step 4: Simplify right side
    28,688.25x = 837,186,868.60
  5. Step 5: Solve for x
    x = 837,186,868.60/28,688.25
  6. Step 6: Final answer
    x = 29,182.22

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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.