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Finding the Fourth Proportional to 19,237.60, 28,856.40 and 18,978.40

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Solution

The fourth proportional to 19,237.60, 28,856.40 and 18,978.40 is: 28,467.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,237.60 : 28,856.40 = 18,978.40 : x
  2. Step 2: Convert to fraction form
    19,237.60/28,856.40 = 18,978.40/x
  3. Step 3: Cross multiply
    19,237.60x = 28,856.40 × 18,978.40
  4. Step 4: Simplify right side
    19,237.60x = 547,648,301.76
  5. Step 5: Solve for x
    x = 547,648,301.76/19,237.60
  6. Step 6: Final answer
    x = 28,467.60

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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.