Home / 28,475.01-42,688.22-20,128.77

Finding the Fourth Proportional to 28,475.01, 42,688.22 and 20,128.77

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Solution

The fourth proportional to 28,475.01, 42,688.22 and 20,128.77 is: 30,175.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,475.01 : 42,688.22 = 20,128.77 : x
  2. Step 2: Convert to fraction form
    28,475.01/42,688.22 = 20,128.77/x
  3. Step 3: Cross multiply
    28,475.01x = 42,688.22 × 20,128.77
  4. Step 4: Simplify right side
    28,475.01x = 859,261,261.45
  5. Step 5: Solve for x
    x = 859,261,261.45/28,475.01
  6. Step 6: Final answer
    x = 30,175.98

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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.