Home / 28,445.64-39,256.80-15,698.76

Finding the Fourth Proportional to 28,445.64, 39,256.80 and 15,698.76

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Solution

The fourth proportional to 28,445.64, 39,256.80 and 15,698.76 is: 21,665.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,445.64 : 39,256.80 = 15,698.76 : x
  2. Step 2: Convert to fraction form
    28,445.64/39,256.80 = 15,698.76/x
  3. Step 3: Cross multiply
    28,445.64x = 39,256.80 × 15,698.76
  4. Step 4: Simplify right side
    28,445.64x = 616,283,081.57
  5. Step 5: Solve for x
    x = 616,283,081.57/28,445.64
  6. Step 6: Final answer
    x = 21,665.29

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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.