Home / 20,623.86-28,461-12,666.06

Finding the Fourth Proportional to 20,623.86, 28,461 and 12,666.06

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Solution

The fourth proportional to 20,623.86, 28,461 and 12,666.06 is: 17,479.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,623.86 : 28,461 = 12,666.06 : x
  2. Step 2: Convert to fraction form
    20,623.86/28,461 = 12,666.06/x
  3. Step 3: Cross multiply
    20,623.86x = 28,461 × 12,666.06
  4. Step 4: Simplify right side
    20,623.86x = 360,488,733.66
  5. Step 5: Solve for x
    x = 360,488,733.66/20,623.86
  6. Step 6: Final answer
    x = 17,479.21

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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.