Home / 7,814.88-10,779.48-5,457.78

Finding the Fourth Proportional to 7,814.88, 10,779.48 and 5,457.78

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Solution

The fourth proportional to 7,814.88, 10,779.48 and 5,457.78 is: 7,528.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,814.88 : 10,779.48 = 5,457.78 : x
  2. Step 2: Convert to fraction form
    7,814.88/10,779.48 = 5,457.78/x
  3. Step 3: Cross multiply
    7,814.88x = 10,779.48 × 5,457.78
  4. Step 4: Simplify right side
    7,814.88x = 58,832,030.35
  5. Step 5: Solve for x
    x = 58,832,030.35/7,814.88
  6. Step 6: Final answer
    x = 7,528.21

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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.