Home / 20,312.93-28,038.89-13,960.55

Finding the Fourth Proportional to 20,312.93, 28,038.89 and 13,960.55

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Solution

The fourth proportional to 20,312.93, 28,038.89 and 13,960.55 is: 19,270.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,312.93 : 28,038.89 = 13,960.55 : x
  2. Step 2: Convert to fraction form
    20,312.93/28,038.89 = 13,960.55/x
  3. Step 3: Cross multiply
    20,312.93x = 28,038.89 × 13,960.55
  4. Step 4: Simplify right side
    20,312.93x = 391,438,115.79
  5. Step 5: Solve for x
    x = 391,438,115.79/20,312.93
  6. Step 6: Final answer
    x = 19,270.40

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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.