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Finding the Fourth Proportional to 20,859.68, 28,798.80 and 18,526.88

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Solution

The fourth proportional to 20,859.68, 28,798.80 and 18,526.88 is: 25,578.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.68 : 28,798.80 = 18,526.88 : x
  2. Step 2: Convert to fraction form
    20,859.68/28,798.80 = 18,526.88/x
  3. Step 3: Cross multiply
    20,859.68x = 28,798.80 × 18,526.88
  4. Step 4: Simplify right side
    20,859.68x = 533,551,911.74
  5. Step 5: Solve for x
    x = 533,551,911.74/20,859.68
  6. Step 6: Final answer
    x = 25,578.14

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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.