Home / 15,862.84-21,869.40-13,615

Finding the Fourth Proportional to 15,862.84, 21,869.40 and 13,615

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Solution

The fourth proportional to 15,862.84, 21,869.40 and 13,615 is: 18,770.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,862.84 : 21,869.40 = 13,615 : x
  2. Step 2: Convert to fraction form
    15,862.84/21,869.40 = 13,615/x
  3. Step 3: Cross multiply
    15,862.84x = 21,869.40 × 13,615
  4. Step 4: Simplify right side
    15,862.84x = 297,751,881
  5. Step 5: Solve for x
    x = 297,751,881/15,862.84
  6. Step 6: Final answer
    x = 18,770.40

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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.