Home / 28,303.72-39,061.11-15,729.28

Finding the Fourth Proportional to 28,303.72, 39,061.11 and 15,729.28

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Solution

The fourth proportional to 28,303.72, 39,061.11 and 15,729.28 is: 21,707.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,303.72 : 39,061.11 = 15,729.28 : x
  2. Step 2: Convert to fraction form
    28,303.72/39,061.11 = 15,729.28/x
  3. Step 3: Cross multiply
    28,303.72x = 39,061.11 × 15,729.28
  4. Step 4: Simplify right side
    28,303.72x = 614,403,136.30
  5. Step 5: Solve for x
    x = 614,403,136.30/28,303.72
  6. Step 6: Final answer
    x = 21,707.50

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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.