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Finding the Fourth Proportional to 28,315.48, 39,063.86 and 16,985.48

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Solution

The fourth proportional to 28,315.48, 39,063.86 and 16,985.48 is: 23,433.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,315.48 : 39,063.86 = 16,985.48 : x
  2. Step 2: Convert to fraction form
    28,315.48/39,063.86 = 16,985.48/x
  3. Step 3: Cross multiply
    28,315.48x = 39,063.86 × 16,985.48
  4. Step 4: Simplify right side
    28,315.48x = 663,518,412.75
  5. Step 5: Solve for x
    x = 663,518,412.75/28,315.48
  6. Step 6: Final answer
    x = 23,433.06

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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.