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Finding the Fourth Proportional to 22,775.80, 31,430.65 and 12,703.98

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Solution

The fourth proportional to 22,775.80, 31,430.65 and 12,703.98 is: 17,531.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,775.80 : 31,430.65 = 12,703.98 : x
  2. Step 2: Convert to fraction form
    22,775.80/31,430.65 = 12,703.98/x
  3. Step 3: Cross multiply
    22,775.80x = 31,430.65 × 12,703.98
  4. Step 4: Simplify right side
    22,775.80x = 399,294,184.32
  5. Step 5: Solve for x
    x = 399,294,184.32/22,775.80
  6. Step 6: Final answer
    x = 17,531.51

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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.