Home / 28,407.81-39,273.63-21,321.93

Finding the Fourth Proportional to 28,407.81, 39,273.63 and 21,321.93

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Solution

The fourth proportional to 28,407.81, 39,273.63 and 21,321.93 is: 29,477.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,407.81 : 39,273.63 = 21,321.93 : x
  2. Step 2: Convert to fraction form
    28,407.81/39,273.63 = 21,321.93/x
  3. Step 3: Cross multiply
    28,407.81x = 39,273.63 × 21,321.93
  4. Step 4: Simplify right side
    28,407.81x = 837,389,589.71
  5. Step 5: Solve for x
    x = 837,389,589.71/28,407.81
  6. Step 6: Final answer
    x = 29,477.44

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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.