Home / 28,347.81-39,070.50-20,778.09

Finding the Fourth Proportional to 28,347.81, 39,070.50 and 20,778.09

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Solution

The fourth proportional to 28,347.81, 39,070.50 and 20,778.09 is: 28,637.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,347.81 : 39,070.50 = 20,778.09 : x
  2. Step 2: Convert to fraction form
    28,347.81/39,070.50 = 20,778.09/x
  3. Step 3: Cross multiply
    28,347.81x = 39,070.50 × 20,778.09
  4. Step 4: Simplify right side
    28,347.81x = 811,810,365.35
  5. Step 5: Solve for x
    x = 811,810,365.35/28,347.81
  6. Step 6: Final answer
    x = 28,637.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.