Home / 28,158.48-42,230.34-8,431.74

Finding the Fourth Proportional to 28,158.48, 42,230.34 and 8,431.74

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Solution

The fourth proportional to 28,158.48, 42,230.34 and 8,431.74 is: 12,645.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,158.48 : 42,230.34 = 8,431.74 : x
  2. Step 2: Convert to fraction form
    28,158.48/42,230.34 = 8,431.74/x
  3. Step 3: Cross multiply
    28,158.48x = 42,230.34 × 8,431.74
  4. Step 4: Simplify right side
    28,158.48x = 356,075,246.99
  5. Step 5: Solve for x
    x = 356,075,246.99/28,158.48
  6. Step 6: Final answer
    x = 12,645.40

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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.