Home / 20,915,985.96-28,859,583.30-12,210,207.72

Finding the Fourth Proportional to 20,915,985.96, 28,859,583.30 and 12,210,207.72

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Solution

The fourth proportional to 20,915,985.96, 28,859,583.30 and 12,210,207.72 is: 16,847,472.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915,985.96 : 28,859,583.30 = 12,210,207.72 : x
  2. Step 2: Convert to fraction form
    20,915,985.96/28,859,583.30 = 12,210,207.72/x
  3. Step 3: Cross multiply
    20,915,985.96x = 28,859,583.30 × 12,210,207.72
  4. Step 4: Simplify right side
    20,915,985.96x = 352,381,506,805,643.12
  5. Step 5: Solve for x
    x = 352,381,506,805,643.12/20,915,985.96
  6. Step 6: Final answer
    x = 16,847,472.91

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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.