Home / 45,128.32-67,690.80-11,848.08

Finding the Fourth Proportional to 45,128.32, 67,690.80 and 11,848.08

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Solution

The fourth proportional to 45,128.32, 67,690.80 and 11,848.08 is: 17,771.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,128.32 : 67,690.80 = 11,848.08 : x
  2. Step 2: Convert to fraction form
    45,128.32/67,690.80 = 11,848.08/x
  3. Step 3: Cross multiply
    45,128.32x = 67,690.80 × 11,848.08
  4. Step 4: Simplify right side
    45,128.32x = 802,006,013.66
  5. Step 5: Solve for x
    x = 802,006,013.66/45,128.32
  6. Step 6: Final answer
    x = 17,771.68

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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.