Home / 28,431.08-42,612.02-20,113.50

Finding the Fourth Proportional to 28,431.08, 42,612.02 and 20,113.50

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Solution

The fourth proportional to 28,431.08, 42,612.02 and 20,113.50 is: 30,145.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.08 : 42,612.02 = 20,113.50 : x
  2. Step 2: Convert to fraction form
    28,431.08/42,612.02 = 20,113.50/x
  3. Step 3: Cross multiply
    28,431.08x = 42,612.02 × 20,113.50
  4. Step 4: Simplify right side
    28,431.08x = 857,076,864.27
  5. Step 5: Solve for x
    x = 857,076,864.27/28,431.08
  6. Step 6: Final answer
    x = 30,145.77

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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.