Home / 6,890,688.36-9,509,699.16-3,990,130.47

Finding the Fourth Proportional to 6,890,688.36, 9,509,699.16 and 3,990,130.47

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Solution

The fourth proportional to 6,890,688.36, 9,509,699.16 and 3,990,130.47 is: 5,506,698.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,890,688.36 : 9,509,699.16 = 3,990,130.47 : x
  2. Step 2: Convert to fraction form
    6,890,688.36/9,509,699.16 = 3,990,130.47/x
  3. Step 3: Cross multiply
    6,890,688.36x = 9,509,699.16 × 3,990,130.47
  4. Step 4: Simplify right side
    6,890,688.36x = 37,944,940,378,849.41
  5. Step 5: Solve for x
    x = 37,944,940,378,849.41/6,890,688.36
  6. Step 6: Final answer
    x = 5,506,698.08

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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.