Home / 30,869.04-42,589.28-18,926.40

Finding the Fourth Proportional to 30,869.04, 42,589.28 and 18,926.40

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Solution

The fourth proportional to 30,869.04, 42,589.28 and 18,926.40 is: 26,112.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,869.04 : 42,589.28 = 18,926.40 : x
  2. Step 2: Convert to fraction form
    30,869.04/42,589.28 = 18,926.40/x
  3. Step 3: Cross multiply
    30,869.04x = 42,589.28 × 18,926.40
  4. Step 4: Simplify right side
    30,869.04x = 806,061,748.99
  5. Step 5: Solve for x
    x = 806,061,748.99/30,869.04
  6. Step 6: Final answer
    x = 26,112.30

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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.