Home / 28,406.06-39,271.21-21,320.18

Finding the Fourth Proportional to 28,406.06, 39,271.21 and 21,320.18

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Solution

The fourth proportional to 28,406.06, 39,271.21 and 21,320.18 is: 29,475.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,406.06 : 39,271.21 = 21,320.18 : x
  2. Step 2: Convert to fraction form
    28,406.06/39,271.21 = 21,320.18/x
  3. Step 3: Cross multiply
    28,406.06x = 39,271.21 × 21,320.18
  4. Step 4: Simplify right side
    28,406.06x = 837,269,069.66
  5. Step 5: Solve for x
    x = 837,269,069.66/28,406.06
  6. Step 6: Final answer
    x = 29,475.02

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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.