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Finding the Fourth Proportional to 12,970.64, 19,425.72 and 12,873.44

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Solution

The fourth proportional to 12,970.64, 19,425.72 and 12,873.44 is: 19,280.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,970.64 : 19,425.72 = 12,873.44 : x
  2. Step 2: Convert to fraction form
    12,970.64/19,425.72 = 12,873.44/x
  3. Step 3: Cross multiply
    12,970.64x = 19,425.72 × 12,873.44
  4. Step 4: Simplify right side
    12,970.64x = 250,075,840.88
  5. Step 5: Solve for x
    x = 250,075,840.88/12,970.64
  6. Step 6: Final answer
    x = 19,280.15

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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.