Home / 28,488.64-39,312.30-15,741.68

Finding the Fourth Proportional to 28,488.64, 39,312.30 and 15,741.68

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Solution

The fourth proportional to 28,488.64, 39,312.30 and 15,741.68 is: 21,722.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,488.64 : 39,312.30 = 15,741.68 : x
  2. Step 2: Convert to fraction form
    28,488.64/39,312.30 = 15,741.68/x
  3. Step 3: Cross multiply
    28,488.64x = 39,312.30 × 15,741.68
  4. Step 4: Simplify right side
    28,488.64x = 618,841,646.66
  5. Step 5: Solve for x
    x = 618,841,646.66/28,488.64
  6. Step 6: Final answer
    x = 21,722.40

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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.