Home / 27,378.81-37,778.40-15,439.41

Finding the Fourth Proportional to 27,378.81, 37,778.40 and 15,439.41

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Solution

The fourth proportional to 27,378.81, 37,778.40 and 15,439.41 is: 21,303.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,378.81 : 37,778.40 = 15,439.41 : x
  2. Step 2: Convert to fraction form
    27,378.81/37,778.40 = 15,439.41/x
  3. Step 3: Cross multiply
    27,378.81x = 37,778.40 × 15,439.41
  4. Step 4: Simplify right side
    27,378.81x = 583,276,206.74
  5. Step 5: Solve for x
    x = 583,276,206.74/27,378.81
  6. Step 6: Final answer
    x = 21,303.93

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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.