Home / 28,158.84-42,238.26-12,587.32

Finding the Fourth Proportional to 28,158.84, 42,238.26 and 12,587.32

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Solution

The fourth proportional to 28,158.84, 42,238.26 and 12,587.32 is: 18,880.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,158.84 : 42,238.26 = 12,587.32 : x
  2. Step 2: Convert to fraction form
    28,158.84/42,238.26 = 12,587.32/x
  3. Step 3: Cross multiply
    28,158.84x = 42,238.26 × 12,587.32
  4. Step 4: Simplify right side
    28,158.84x = 531,666,494.86
  5. Step 5: Solve for x
    x = 531,666,494.86/28,158.84
  6. Step 6: Final answer
    x = 18,880.98

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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.