Home / 12,973.40-19,421.70-7,789.40

Finding the Fourth Proportional to 12,973.40, 19,421.70 and 7,789.40

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Solution

The fourth proportional to 12,973.40, 19,421.70 and 7,789.40 is: 11,661.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,973.40 : 19,421.70 = 7,789.40 : x
  2. Step 2: Convert to fraction form
    12,973.40/19,421.70 = 7,789.40/x
  3. Step 3: Cross multiply
    12,973.40x = 19,421.70 × 7,789.40
  4. Step 4: Simplify right side
    12,973.40x = 151,283,389.98
  5. Step 5: Solve for x
    x = 151,283,389.98/12,973.40
  6. Step 6: Final answer
    x = 11,661.04

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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.