Home / 13,574.34-18,715.13-8,785.80

Finding the Fourth Proportional to 13,574.34, 18,715.13 and 8,785.80

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Solution

The fourth proportional to 13,574.34, 18,715.13 and 8,785.80 is: 12,113.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,574.34 : 18,715.13 = 8,785.80 : x
  2. Step 2: Convert to fraction form
    13,574.34/18,715.13 = 8,785.80/x
  3. Step 3: Cross multiply
    13,574.34x = 18,715.13 × 8,785.80
  4. Step 4: Simplify right side
    13,574.34x = 164,427,345.23
  5. Step 5: Solve for x
    x = 164,427,345.23/13,574.34
  6. Step 6: Final answer
    x = 12,113.10

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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.