Home / 8,721.16-12,036.80-5,184.65

Finding the Fourth Proportional to 8,721.16, 12,036.80 and 5,184.65

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Solution

The fourth proportional to 8,721.16, 12,036.80 and 5,184.65 is: 7,155.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.16 : 12,036.80 = 5,184.65 : x
  2. Step 2: Convert to fraction form
    8,721.16/12,036.80 = 5,184.65/x
  3. Step 3: Cross multiply
    8,721.16x = 12,036.80 × 5,184.65
  4. Step 4: Simplify right side
    8,721.16x = 62,406,595.12
  5. Step 5: Solve for x
    x = 62,406,595.12/8,721.16
  6. Step 6: Final answer
    x = 7,155.77

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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.