Home / 14,778.90-20,417.10-9,686.50

Finding the Fourth Proportional to 14,778.90, 20,417.10 and 9,686.50

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Solution

The fourth proportional to 14,778.90, 20,417.10 and 9,686.50 is: 13,381.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,778.90 : 20,417.10 = 9,686.50 : x
  2. Step 2: Convert to fraction form
    14,778.90/20,417.10 = 9,686.50/x
  3. Step 3: Cross multiply
    14,778.90x = 20,417.10 × 9,686.50
  4. Step 4: Simplify right side
    14,778.90x = 197,770,246.51
  5. Step 5: Solve for x
    x = 197,770,246.51/14,778.90
  6. Step 6: Final answer
    x = 13,381.93

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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.