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Finding the Fourth Proportional to 42,653.79, 63,959.63 and 13,064.49

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Solution

The fourth proportional to 42,653.79, 63,959.63 and 13,064.49 is: 19,590.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,653.79 : 63,959.63 = 13,064.49 : x
  2. Step 2: Convert to fraction form
    42,653.79/63,959.63 = 13,064.49/x
  3. Step 3: Cross multiply
    42,653.79x = 63,959.63 × 13,064.49
  4. Step 4: Simplify right side
    42,653.79x = 835,599,881.22
  5. Step 5: Solve for x
    x = 835,599,881.22/42,653.79
  6. Step 6: Final answer
    x = 19,590.28

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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.