Home / 28,014.08-38,661.16-15,438.80

Finding the Fourth Proportional to 28,014.08, 38,661.16 and 15,438.80

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Solution

The fourth proportional to 28,014.08, 38,661.16 and 15,438.80 is: 21,306.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,014.08 : 38,661.16 = 15,438.80 : x
  2. Step 2: Convert to fraction form
    28,014.08/38,661.16 = 15,438.80/x
  3. Step 3: Cross multiply
    28,014.08x = 38,661.16 × 15,438.80
  4. Step 4: Simplify right side
    28,014.08x = 596,881,917.01
  5. Step 5: Solve for x
    x = 596,881,917.01/28,014.08
  6. Step 6: Final answer
    x = 21,306.50

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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.