Home / 28,678.80-39,570.28-16,102.72

Finding the Fourth Proportional to 28,678.80, 39,570.28 and 16,102.72

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Solution

The fourth proportional to 28,678.80, 39,570.28 and 16,102.72 is: 22,218.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,678.80 : 39,570.28 = 16,102.72 : x
  2. Step 2: Convert to fraction form
    28,678.80/39,570.28 = 16,102.72/x
  3. Step 3: Cross multiply
    28,678.80x = 39,570.28 × 16,102.72
  4. Step 4: Simplify right side
    28,678.80x = 637,189,139.16
  5. Step 5: Solve for x
    x = 637,189,139.16/28,678.80
  6. Step 6: Final answer
    x = 22,218.12

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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.