Home / 20,430.60-28,192.50-11,477.40

Finding the Fourth Proportional to 20,430.60, 28,192.50 and 11,477.40

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Solution

The fourth proportional to 20,430.60, 28,192.50 and 11,477.40 is: 15,837.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.60 : 28,192.50 = 11,477.40 : x
  2. Step 2: Convert to fraction form
    20,430.60/28,192.50 = 11,477.40/x
  3. Step 3: Cross multiply
    20,430.60x = 28,192.50 × 11,477.40
  4. Step 4: Simplify right side
    20,430.60x = 323,576,599.50
  5. Step 5: Solve for x
    x = 323,576,599.50/20,430.60
  6. Step 6: Final answer
    x = 15,837.84

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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.