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Finding the Fourth Proportional to 12,888.90, 19,339.44 and 7,045.32

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Solution

The fourth proportional to 12,888.90, 19,339.44 and 7,045.32 is: 10,571.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888.90 : 19,339.44 = 7,045.32 : x
  2. Step 2: Convert to fraction form
    12,888.90/19,339.44 = 7,045.32/x
  3. Step 3: Cross multiply
    12,888.90x = 19,339.44 × 7,045.32
  4. Step 4: Simplify right side
    12,888.90x = 136,252,543.42
  5. Step 5: Solve for x
    x = 136,252,543.42/12,888.90
  6. Step 6: Final answer
    x = 10,571.31

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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.