Home / 10,639.72-15,977.37-6,646.40

Finding the Fourth Proportional to 10,639.72, 15,977.37 and 6,646.40

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Solution

The fourth proportional to 10,639.72, 15,977.37 and 6,646.40 is: 9,980.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,639.72 : 15,977.37 = 6,646.40 : x
  2. Step 2: Convert to fraction form
    10,639.72/15,977.37 = 6,646.40/x
  3. Step 3: Cross multiply
    10,639.72x = 15,977.37 × 6,646.40
  4. Step 4: Simplify right side
    10,639.72x = 106,191,953.37
  5. Step 5: Solve for x
    x = 106,191,953.37/10,639.72
  6. Step 6: Final answer
    x = 9,980.71

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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.