Home / 20,647.16-28,493.14-11,215.52

Finding the Fourth Proportional to 20,647.16, 28,493.14 and 11,215.52

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Solution

The fourth proportional to 20,647.16, 28,493.14 and 11,215.52 is: 15,477.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.16 : 28,493.14 = 11,215.52 : x
  2. Step 2: Convert to fraction form
    20,647.16/28,493.14 = 11,215.52/x
  3. Step 3: Cross multiply
    20,647.16x = 28,493.14 × 11,215.52
  4. Step 4: Simplify right side
    20,647.16x = 319,565,381.53
  5. Step 5: Solve for x
    x = 319,565,381.53/20,647.16
  6. Step 6: Final answer
    x = 15,477.45

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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.