Home / 28,718.10-39,630.60-15,971.40

Finding the Fourth Proportional to 28,718.10, 39,630.60 and 15,971.40

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Solution

The fourth proportional to 28,718.10, 39,630.60 and 15,971.40 is: 22,040.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,718.10 : 39,630.60 = 15,971.40 : x
  2. Step 2: Convert to fraction form
    28,718.10/39,630.60 = 15,971.40/x
  3. Step 3: Cross multiply
    28,718.10x = 39,630.60 × 15,971.40
  4. Step 4: Simplify right side
    28,718.10x = 632,956,164.84
  5. Step 5: Solve for x
    x = 632,956,164.84/28,718.10
  6. Step 6: Final answer
    x = 22,040.32

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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.