Home / 20,647.17-28,492.47-11,215.71

Finding the Fourth Proportional to 20,647.17, 28,492.47 and 11,215.71

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Solution

The fourth proportional to 20,647.17, 28,492.47 and 11,215.71 is: 15,477.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.17 : 28,492.47 = 11,215.71 : x
  2. Step 2: Convert to fraction form
    20,647.17/28,492.47 = 11,215.71/x
  3. Step 3: Cross multiply
    20,647.17x = 28,492.47 × 11,215.71
  4. Step 4: Simplify right side
    20,647.17x = 319,563,280.70
  5. Step 5: Solve for x
    x = 319,563,280.70/20,647.17
  6. Step 6: Final answer
    x = 15,477.34

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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.