Home / 15,485.83-21,367.91-9,117.79

Finding the Fourth Proportional to 15,485.83, 21,367.91 and 9,117.79

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Solution

The fourth proportional to 15,485.83, 21,367.91 and 9,117.79 is: 12,581.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.83 : 21,367.91 = 9,117.79 : x
  2. Step 2: Convert to fraction form
    15,485.83/21,367.91 = 9,117.79/x
  3. Step 3: Cross multiply
    15,485.83x = 21,367.91 × 9,117.79
  4. Step 4: Simplify right side
    15,485.83x = 194,828,009.28
  5. Step 5: Solve for x
    x = 194,828,009.28/15,485.83
  6. Step 6: Final answer
    x = 12,581.05

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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.