Home / 28,558.36-39,410.76-15,811.74

Finding the Fourth Proportional to 28,558.36, 39,410.76 and 15,811.74

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Solution

The fourth proportional to 28,558.36, 39,410.76 and 15,811.74 is: 21,820.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,558.36 : 39,410.76 = 15,811.74 : x
  2. Step 2: Convert to fraction form
    28,558.36/39,410.76 = 15,811.74/x
  3. Step 3: Cross multiply
    28,558.36x = 39,410.76 × 15,811.74
  4. Step 4: Simplify right side
    28,558.36x = 623,152,690.32
  5. Step 5: Solve for x
    x = 623,152,690.32/28,558.36
  6. Step 6: Final answer
    x = 21,820.32

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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.