Home / 14,085.29-21,128.55-5,320.89

Finding the Fourth Proportional to 14,085.29, 21,128.55 and 5,320.89

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Solution

The fourth proportional to 14,085.29, 21,128.55 and 5,320.89 is: 7,981.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,085.29 : 21,128.55 = 5,320.89 : x
  2. Step 2: Convert to fraction form
    14,085.29/21,128.55 = 5,320.89/x
  3. Step 3: Cross multiply
    14,085.29x = 21,128.55 × 5,320.89
  4. Step 4: Simplify right side
    14,085.29x = 112,422,670.46
  5. Step 5: Solve for x
    x = 112,422,670.46/14,085.29
  6. Step 6: Final answer
    x = 7,981.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.