Home / 12,439.84-17,159.16-7,400.47

Finding the Fourth Proportional to 12,439.84, 17,159.16 and 7,400.47

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Solution

The fourth proportional to 12,439.84, 17,159.16 and 7,400.47 is: 10,208.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.84 : 17,159.16 = 7,400.47 : x
  2. Step 2: Convert to fraction form
    12,439.84/17,159.16 = 7,400.47/x
  3. Step 3: Cross multiply
    12,439.84x = 17,159.16 × 7,400.47
  4. Step 4: Simplify right side
    12,439.84x = 126,985,848.81
  5. Step 5: Solve for x
    x = 126,985,848.81/12,439.84
  6. Step 6: Final answer
    x = 10,208.00

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1.5x scale

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.