Home / 28,390.36-42,600.12-12,606.20

Finding the Fourth Proportional to 28,390.36, 42,600.12 and 12,606.20

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Solution

The fourth proportional to 28,390.36, 42,600.12 and 12,606.20 is: 18,915.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,390.36 : 42,600.12 = 12,606.20 : x
  2. Step 2: Convert to fraction form
    28,390.36/42,600.12 = 12,606.20/x
  3. Step 3: Cross multiply
    28,390.36x = 42,600.12 × 12,606.20
  4. Step 4: Simplify right side
    28,390.36x = 537,025,632.74
  5. Step 5: Solve for x
    x = 537,025,632.74/28,390.36
  6. Step 6: Final answer
    x = 18,915.77

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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.