Home / 28,870,143.72-39,840,797.20-15,817,897.68

Finding the Fourth Proportional to 28,870,143.72, 39,840,797.20 and 15,817,897.68

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Solution

The fourth proportional to 28,870,143.72, 39,840,797.20 and 15,817,897.68 is: 21,828,698.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,870,143.72 : 39,840,797.20 = 15,817,897.68 : x
  2. Step 2: Convert to fraction form
    28,870,143.72/39,840,797.20 = 15,817,897.68/x
  3. Step 3: Cross multiply
    28,870,143.72x = 39,840,797.20 × 15,817,897.68
  4. Step 4: Simplify right side
    28,870,143.72x = 630,197,653,599,230.50
  5. Step 5: Solve for x
    x = 630,197,653,599,230.50/28,870,143.72
  6. Step 6: Final answer
    x = 21,828,698.18

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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.