Home / 19,160.40-28,740.60-9,318.90

Finding the Fourth Proportional to 19,160.40, 28,740.60 and 9,318.90

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Solution

The fourth proportional to 19,160.40, 28,740.60 and 9,318.90 is: 13,978.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,160.40 : 28,740.60 = 9,318.90 : x
  2. Step 2: Convert to fraction form
    19,160.40/28,740.60 = 9,318.90/x
  3. Step 3: Cross multiply
    19,160.40x = 28,740.60 × 9,318.90
  4. Step 4: Simplify right side
    19,160.40x = 267,830,777.34
  5. Step 5: Solve for x
    x = 267,830,777.34/19,160.40
  6. Step 6: Final answer
    x = 13,978.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.