Home / 13,239.36-19,800.70-7,678.30

Finding the Fourth Proportional to 13,239.36, 19,800.70 and 7,678.30

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Solution

The fourth proportional to 13,239.36, 19,800.70 and 7,678.30 is: 11,483.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.36 : 19,800.70 = 7,678.30 : x
  2. Step 2: Convert to fraction form
    13,239.36/19,800.70 = 7,678.30/x
  3. Step 3: Cross multiply
    13,239.36x = 19,800.70 × 7,678.30
  4. Step 4: Simplify right side
    13,239.36x = 152,035,714.81
  5. Step 5: Solve for x
    x = 152,035,714.81/13,239.36
  6. Step 6: Final answer
    x = 11,483.62

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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.