Home / 20,870.16-31,312.24-6,830.84

Finding the Fourth Proportional to 20,870.16, 31,312.24 and 6,830.84

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Solution

The fourth proportional to 20,870.16, 31,312.24 and 6,830.84 is: 10,248.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.16 : 31,312.24 = 6,830.84 : x
  2. Step 2: Convert to fraction form
    20,870.16/31,312.24 = 6,830.84/x
  3. Step 3: Cross multiply
    20,870.16x = 31,312.24 × 6,830.84
  4. Step 4: Simplify right side
    20,870.16x = 213,888,901.48
  5. Step 5: Solve for x
    x = 213,888,901.48/20,870.16
  6. Step 6: Final answer
    x = 10,248.55

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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.