Home / 21,121.77-31,678.47-6,130.65

Finding the Fourth Proportional to 21,121.77, 31,678.47 and 6,130.65

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Solution

The fourth proportional to 21,121.77, 31,678.47 and 6,130.65 is: 9,194.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.77 : 31,678.47 = 6,130.65 : x
  2. Step 2: Convert to fraction form
    21,121.77/31,678.47 = 6,130.65/x
  3. Step 3: Cross multiply
    21,121.77x = 31,678.47 × 6,130.65
  4. Step 4: Simplify right side
    21,121.77x = 194,209,612.11
  5. Step 5: Solve for x
    x = 194,209,612.11/21,121.77
  6. Step 6: Final answer
    x = 9,194.76

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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.