Home / 31,047.40-42,834.29-20,840.93

Finding the Fourth Proportional to 31,047.40, 42,834.29 and 20,840.93

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Solution

The fourth proportional to 31,047.40, 42,834.29 and 20,840.93 is: 28,753.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,047.40 : 42,834.29 = 20,840.93 : x
  2. Step 2: Convert to fraction form
    31,047.40/42,834.29 = 20,840.93/x
  3. Step 3: Cross multiply
    31,047.40x = 42,834.29 × 20,840.93
  4. Step 4: Simplify right side
    31,047.40x = 892,706,281.74
  5. Step 5: Solve for x
    x = 892,706,281.74/31,047.40
  6. Step 6: Final answer
    x = 28,753.01

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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.