Home / 28,078.16-38,746.76-15,502.80

Finding the Fourth Proportional to 28,078.16, 38,746.76 and 15,502.80

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Solution

The fourth proportional to 28,078.16, 38,746.76 and 15,502.80 is: 21,393.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,078.16 : 38,746.76 = 15,502.80 : x
  2. Step 2: Convert to fraction form
    28,078.16/38,746.76 = 15,502.80/x
  3. Step 3: Cross multiply
    28,078.16x = 38,746.76 × 15,502.80
  4. Step 4: Simplify right side
    28,078.16x = 600,683,270.93
  5. Step 5: Solve for x
    x = 600,683,270.93/28,078.16
  6. Step 6: Final answer
    x = 21,393.26

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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.