Home / 19,135.40-28,710.47-6,656.72

Finding the Fourth Proportional to 19,135.40, 28,710.47 and 6,656.72

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Solution

The fourth proportional to 19,135.40, 28,710.47 and 6,656.72 is: 9,987.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,135.40 : 28,710.47 = 6,656.72 : x
  2. Step 2: Convert to fraction form
    19,135.40/28,710.47 = 6,656.72/x
  3. Step 3: Cross multiply
    19,135.40x = 28,710.47 × 6,656.72
  4. Step 4: Simplify right side
    19,135.40x = 191,117,432.95
  5. Step 5: Solve for x
    x = 191,117,432.95/19,135.40
  6. Step 6: Final answer
    x = 9,987.64

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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.