Home / 28,457.96-39,275.70-15,885.32

Finding the Fourth Proportional to 28,457.96, 39,275.70 and 15,885.32

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Solution

The fourth proportional to 28,457.96, 39,275.70 and 15,885.32 is: 21,923.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,457.96 : 39,275.70 = 15,885.32 : x
  2. Step 2: Convert to fraction form
    28,457.96/39,275.70 = 15,885.32/x
  3. Step 3: Cross multiply
    28,457.96x = 39,275.70 × 15,885.32
  4. Step 4: Simplify right side
    28,457.96x = 623,907,062.72
  5. Step 5: Solve for x
    x = 623,907,062.72/28,457.96
  6. Step 6: Final answer
    x = 21,923.82

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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.