Home / 12,870.30-19,305.45-7,923.90

Finding the Fourth Proportional to 12,870.30, 19,305.45 and 7,923.90

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Solution

The fourth proportional to 12,870.30, 19,305.45 and 7,923.90 is: 11,885.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,870.30 : 19,305.45 = 7,923.90 : x
  2. Step 2: Convert to fraction form
    12,870.30/19,305.45 = 7,923.90/x
  3. Step 3: Cross multiply
    12,870.30x = 19,305.45 × 7,923.90
  4. Step 4: Simplify right side
    12,870.30x = 152,974,455.26
  5. Step 5: Solve for x
    x = 152,974,455.26/12,870.30
  6. Step 6: Final answer
    x = 11,885.85

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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.