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Finding the Fourth Proportional to 34,985.40, 48,278.40 and 19,069.50

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Solution

The fourth proportional to 34,985.40, 48,278.40 and 19,069.50 is: 26,315.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,985.40 : 48,278.40 = 19,069.50 : x
  2. Step 2: Convert to fraction form
    34,985.40/48,278.40 = 19,069.50/x
  3. Step 3: Cross multiply
    34,985.40x = 48,278.40 × 19,069.50
  4. Step 4: Simplify right side
    34,985.40x = 920,644,948.80
  5. Step 5: Solve for x
    x = 920,644,948.80/34,985.40
  6. Step 6: Final answer
    x = 26,315.12

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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.