Home / 20,384.15-28,130.41-12,316.68

Finding the Fourth Proportional to 20,384.15, 28,130.41 and 12,316.68

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Solution

The fourth proportional to 20,384.15, 28,130.41 and 12,316.68 is: 16,997.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.15 : 28,130.41 = 12,316.68 : x
  2. Step 2: Convert to fraction form
    20,384.15/28,130.41 = 12,316.68/x
  3. Step 3: Cross multiply
    20,384.15x = 28,130.41 × 12,316.68
  4. Step 4: Simplify right side
    20,384.15x = 346,473,379.12
  5. Step 5: Solve for x
    x = 346,473,379.12/20,384.15
  6. Step 6: Final answer
    x = 16,997.20

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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.