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Finding the Fourth Proportional to 28,650.54, 42,970.20 and 14,415.20

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Solution

The fourth proportional to 28,650.54, 42,970.20 and 14,415.20 is: 21,619.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,650.54 : 42,970.20 = 14,415.20 : x
  2. Step 2: Convert to fraction form
    28,650.54/42,970.20 = 14,415.20/x
  3. Step 3: Cross multiply
    28,650.54x = 42,970.20 × 14,415.20
  4. Step 4: Simplify right side
    28,650.54x = 619,424,027.04
  5. Step 5: Solve for x
    x = 619,424,027.04/28,650.54
  6. Step 6: Final answer
    x = 21,619.98

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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.