Home / 13,781.07-19,018.40-8,190.99

Finding the Fourth Proportional to 13,781.07, 19,018.40 and 8,190.99

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Solution

The fourth proportional to 13,781.07, 19,018.40 and 8,190.99 is: 11,303.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.07 : 19,018.40 = 8,190.99 : x
  2. Step 2: Convert to fraction form
    13,781.07/19,018.40 = 8,190.99/x
  3. Step 3: Cross multiply
    13,781.07x = 19,018.40 × 8,190.99
  4. Step 4: Simplify right side
    13,781.07x = 155,779,483.26
  5. Step 5: Solve for x
    x = 155,779,483.26/13,781.07
  6. Step 6: Final answer
    x = 11,303.87

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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.