Home / 28,139.76-38,833.02-15,564.51

Finding the Fourth Proportional to 28,139.76, 38,833.02 and 15,564.51

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Solution

The fourth proportional to 28,139.76, 38,833.02 and 15,564.51 is: 21,479.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.76 : 38,833.02 = 15,564.51 : x
  2. Step 2: Convert to fraction form
    28,139.76/38,833.02 = 15,564.51/x
  3. Step 3: Cross multiply
    28,139.76x = 38,833.02 × 15,564.51
  4. Step 4: Simplify right side
    28,139.76x = 604,416,928.12
  5. Step 5: Solve for x
    x = 604,416,928.12/28,139.76
  6. Step 6: Final answer
    x = 21,479.11

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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.