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Finding the Fourth Proportional to 51,869.40, 77,813.70 and 16,810.20

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Solution

The fourth proportional to 51,869.40, 77,813.70 and 16,810.20 is: 25,218.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,869.40 : 77,813.70 = 16,810.20 : x
  2. Step 2: Convert to fraction form
    51,869.40/77,813.70 = 16,810.20/x
  3. Step 3: Cross multiply
    51,869.40x = 77,813.70 × 16,810.20
  4. Step 4: Simplify right side
    51,869.40x = 1,308,063,859.74
  5. Step 5: Solve for x
    x = 1,308,063,859.74/51,869.40
  6. Step 6: Final answer
    x = 25,218.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.