Home / 20,864.81-28,776.67-18,341.55

Finding the Fourth Proportional to 20,864.81, 28,776.67 and 18,341.55

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Solution

The fourth proportional to 20,864.81, 28,776.67 and 18,341.55 is: 25,296.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.81 : 28,776.67 = 18,341.55 : x
  2. Step 2: Convert to fraction form
    20,864.81/28,776.67 = 18,341.55/x
  3. Step 3: Cross multiply
    20,864.81x = 28,776.67 × 18,341.55
  4. Step 4: Simplify right side
    20,864.81x = 527,808,731.64
  5. Step 5: Solve for x
    x = 527,808,731.64/20,864.81
  6. Step 6: Final answer
    x = 25,296.60

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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.