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Finding the Fourth Proportional to 28,779.57, 39,715.76 and 16,845.17

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Solution

The fourth proportional to 28,779.57, 39,715.76 and 16,845.17 is: 23,246.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,779.57 : 39,715.76 = 16,845.17 : x
  2. Step 2: Convert to fraction form
    28,779.57/39,715.76 = 16,845.17/x
  3. Step 3: Cross multiply
    28,779.57x = 39,715.76 × 16,845.17
  4. Step 4: Simplify right side
    28,779.57x = 669,018,446.07
  5. Step 5: Solve for x
    x = 669,018,446.07/28,779.57
  6. Step 6: Final answer
    x = 23,246.30

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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.