Home / 14,389.52-19,856.88-8,421.71

Finding the Fourth Proportional to 14,389.52, 19,856.88 and 8,421.71

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Solution

The fourth proportional to 14,389.52, 19,856.88 and 8,421.71 is: 11,621.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,389.52 : 19,856.88 = 8,421.71 : x
  2. Step 2: Convert to fraction form
    14,389.52/19,856.88 = 8,421.71/x
  3. Step 3: Cross multiply
    14,389.52x = 19,856.88 × 8,421.71
  4. Step 4: Simplify right side
    14,389.52x = 167,228,785.58
  5. Step 5: Solve for x
    x = 167,228,785.58/14,389.52
  6. Step 6: Final answer
    x = 11,621.57

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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.