Home / 19,617.58-29,417.16-7,128.80

Finding the Fourth Proportional to 19,617.58, 29,417.16 and 7,128.80

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Solution

The fourth proportional to 19,617.58, 29,417.16 and 7,128.80 is: 10,689.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,617.58 : 29,417.16 = 7,128.80 : x
  2. Step 2: Convert to fraction form
    19,617.58/29,417.16 = 7,128.80/x
  3. Step 3: Cross multiply
    19,617.58x = 29,417.16 × 7,128.80
  4. Step 4: Simplify right side
    19,617.58x = 209,709,050.21
  5. Step 5: Solve for x
    x = 209,709,050.21/19,617.58
  6. Step 6: Final answer
    x = 10,689.85

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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.