Home / 15,431.85-21,281.05-13,041.88

Finding the Fourth Proportional to 15,431.85, 21,281.05 and 13,041.88

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Solution

The fourth proportional to 15,431.85, 21,281.05 and 13,041.88 is: 17,985.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.85 : 21,281.05 = 13,041.88 : x
  2. Step 2: Convert to fraction form
    15,431.85/21,281.05 = 13,041.88/x
  3. Step 3: Cross multiply
    15,431.85x = 21,281.05 × 13,041.88
  4. Step 4: Simplify right side
    15,431.85x = 277,544,790.11
  5. Step 5: Solve for x
    x = 277,544,790.11/15,431.85
  6. Step 6: Final answer
    x = 17,985.19

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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.