Home / 13,556.16-18,711.12-12,730.08

Finding the Fourth Proportional to 13,556.16, 18,711.12 and 12,730.08

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Solution

The fourth proportional to 13,556.16, 18,711.12 and 12,730.08 is: 17,570.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,556.16 : 18,711.12 = 12,730.08 : x
  2. Step 2: Convert to fraction form
    13,556.16/18,711.12 = 12,730.08/x
  3. Step 3: Cross multiply
    13,556.16x = 18,711.12 × 12,730.08
  4. Step 4: Simplify right side
    13,556.16x = 238,194,054.49
  5. Step 5: Solve for x
    x = 238,194,054.49/13,556.16
  6. Step 6: Final answer
    x = 17,570.91

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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.