Home / 13,607.15-18,779.78-7,639.27

Finding the Fourth Proportional to 13,607.15, 18,779.78 and 7,639.27

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Solution

The fourth proportional to 13,607.15, 18,779.78 and 7,639.27 is: 10,543.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.15 : 18,779.78 = 7,639.27 : x
  2. Step 2: Convert to fraction form
    13,607.15/18,779.78 = 7,639.27/x
  3. Step 3: Cross multiply
    13,607.15x = 18,779.78 × 7,639.27
  4. Step 4: Simplify right side
    13,607.15x = 143,463,782.11
  5. Step 5: Solve for x
    x = 143,463,782.11/13,607.15
  6. Step 6: Final answer
    x = 10,543.27

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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.