Home / 20,985.80-28,901.69-17,416.13

Finding the Fourth Proportional to 20,985.80, 28,901.69 and 17,416.13

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Solution

The fourth proportional to 20,985.80, 28,901.69 and 17,416.13 is: 23,985.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.80 : 28,901.69 = 17,416.13 : x
  2. Step 2: Convert to fraction form
    20,985.80/28,901.69 = 17,416.13/x
  3. Step 3: Cross multiply
    20,985.80x = 28,901.69 × 17,416.13
  4. Step 4: Simplify right side
    20,985.80x = 503,355,423.98
  5. Step 5: Solve for x
    x = 503,355,423.98/20,985.80
  6. Step 6: Final answer
    x = 23,985.53

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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.