Home / 13,859.02-19,126.42-7,890.68

Finding the Fourth Proportional to 13,859.02, 19,126.42 and 7,890.68

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Solution

The fourth proportional to 13,859.02, 19,126.42 and 7,890.68 is: 10,889.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,859.02 : 19,126.42 = 7,890.68 : x
  2. Step 2: Convert to fraction form
    13,859.02/19,126.42 = 7,890.68/x
  3. Step 3: Cross multiply
    13,859.02x = 19,126.42 × 7,890.68
  4. Step 4: Simplify right side
    13,859.02x = 150,920,459.77
  5. Step 5: Solve for x
    x = 150,920,459.77/13,859.02
  6. Step 6: Final answer
    x = 10,889.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.