Home / 19,780.40-29,675.28-6,453.32

Finding the Fourth Proportional to 19,780.40, 29,675.28 and 6,453.32

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Solution

The fourth proportional to 19,780.40, 29,675.28 and 6,453.32 is: 9,681.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,780.40 : 29,675.28 = 6,453.32 : x
  2. Step 2: Convert to fraction form
    19,780.40/29,675.28 = 6,453.32/x
  3. Step 3: Cross multiply
    19,780.40x = 29,675.28 × 6,453.32
  4. Step 4: Simplify right side
    19,780.40x = 191,504,077.93
  5. Step 5: Solve for x
    x = 191,504,077.93/19,780.40
  6. Step 6: Final answer
    x = 9,681.51

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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.