Home / 12,779.64-19,161.36-5,389.20

Finding the Fourth Proportional to 12,779.64, 19,161.36 and 5,389.20

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Solution

The fourth proportional to 12,779.64, 19,161.36 and 5,389.20 is: 8,080.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,779.64 : 19,161.36 = 5,389.20 : x
  2. Step 2: Convert to fraction form
    12,779.64/19,161.36 = 5,389.20/x
  3. Step 3: Cross multiply
    12,779.64x = 19,161.36 × 5,389.20
  4. Step 4: Simplify right side
    12,779.64x = 103,264,401.31
  5. Step 5: Solve for x
    x = 103,264,401.31/12,779.64
  6. Step 6: Final answer
    x = 8,080.38

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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.