Home / 28,475.64-39,298.14-15,728.76

Finding the Fourth Proportional to 28,475.64, 39,298.14 and 15,728.76

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Solution

The fourth proportional to 28,475.64, 39,298.14 and 15,728.76 is: 21,706.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,475.64 : 39,298.14 = 15,728.76 : x
  2. Step 2: Convert to fraction form
    28,475.64/39,298.14 = 15,728.76/x
  3. Step 3: Cross multiply
    28,475.64x = 39,298.14 × 15,728.76
  4. Step 4: Simplify right side
    28,475.64x = 618,111,012.51
  5. Step 5: Solve for x
    x = 618,111,012.51/28,475.64
  6. Step 6: Final answer
    x = 21,706.66

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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.