Home / 31,011.02-42,814.98-20,418.92

Finding the Fourth Proportional to 31,011.02, 42,814.98 and 20,418.92

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Solution

The fourth proportional to 31,011.02, 42,814.98 and 20,418.92 is: 28,191.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,011.02 : 42,814.98 = 20,418.92 : x
  2. Step 2: Convert to fraction form
    31,011.02/42,814.98 = 20,418.92/x
  3. Step 3: Cross multiply
    31,011.02x = 42,814.98 × 20,418.92
  4. Step 4: Simplify right side
    31,011.02x = 874,235,651.42
  5. Step 5: Solve for x
    x = 874,235,651.42/31,011.02
  6. Step 6: Final answer
    x = 28,191.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.