Home / 21,616,319.70-29,827,575.10-12,912,644.72

Finding the Fourth Proportional to 21,616,319.70, 29,827,575.10 and 12,912,644.72

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Solution

The fourth proportional to 21,616,319.70, 29,827,575.10 and 12,912,644.72 is: 17,817,689.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,616,319.70 : 29,827,575.10 = 12,912,644.72 : x
  2. Step 2: Convert to fraction form
    21,616,319.70/29,827,575.10 = 12,912,644.72/x
  3. Step 3: Cross multiply
    21,616,319.70x = 29,827,575.10 × 12,912,644.72
  4. Step 4: Simplify right side
    21,616,319.70x = 385,152,880,216,128.25
  5. Step 5: Solve for x
    x = 385,152,880,216,128.25/21,616,319.70
  6. Step 6: Final answer
    x = 17,817,689.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.