Home / 28,708.02-39,605.81-21,172.44

Finding the Fourth Proportional to 28,708.02, 39,605.81 and 21,172.44

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Solution

The fourth proportional to 28,708.02, 39,605.81 and 21,172.44 is: 29,209.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,708.02 : 39,605.81 = 21,172.44 : x
  2. Step 2: Convert to fraction form
    28,708.02/39,605.81 = 21,172.44/x
  3. Step 3: Cross multiply
    28,708.02x = 39,605.81 × 21,172.44
  4. Step 4: Simplify right side
    28,708.02x = 838,551,574.85
  5. Step 5: Solve for x
    x = 838,551,574.85/28,708.02
  6. Step 6: Final answer
    x = 29,209.66

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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.