Home / 21,055,095.10-31,582,642.65-12,870,903.70

Finding the Fourth Proportional to 21,055,095.10, 31,582,642.65 and 12,870,903.70

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Solution

The fourth proportional to 21,055,095.10, 31,582,642.65 and 12,870,903.70 is: 19,306,355.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055,095.10 : 31,582,642.65 = 12,870,903.70 : x
  2. Step 2: Convert to fraction form
    21,055,095.10/31,582,642.65 = 12,870,903.70/x
  3. Step 3: Cross multiply
    21,055,095.10x = 31,582,642.65 × 12,870,903.70
  4. Step 4: Simplify right side
    21,055,095.10x = 406,497,152,139,662.75
  5. Step 5: Solve for x
    x = 406,497,152,139,662.75/21,055,095.10
  6. Step 6: Final answer
    x = 19,306,355.55

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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.