Home / 39,780.64-59,559.60-21,271.84

Finding the Fourth Proportional to 39,780.64, 59,559.60 and 21,271.84

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Solution

The fourth proportional to 39,780.64, 59,559.60 and 21,271.84 is: 31,848.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.64 : 59,559.60 = 21,271.84 : x
  2. Step 2: Convert to fraction form
    39,780.64/59,559.60 = 21,271.84/x
  3. Step 3: Cross multiply
    39,780.64x = 59,559.60 × 21,271.84
  4. Step 4: Simplify right side
    39,780.64x = 1,266,942,281.66
  5. Step 5: Solve for x
    x = 1,266,942,281.66/39,780.64
  6. Step 6: Final answer
    x = 31,848.21

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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.