Home / 14,002.80-19,323.36-7,715.20

Finding the Fourth Proportional to 14,002.80, 19,323.36 and 7,715.20

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Solution

The fourth proportional to 14,002.80, 19,323.36 and 7,715.20 is: 10,646.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,002.80 : 19,323.36 = 7,715.20 : x
  2. Step 2: Convert to fraction form
    14,002.80/19,323.36 = 7,715.20/x
  3. Step 3: Cross multiply
    14,002.80x = 19,323.36 × 7,715.20
  4. Step 4: Simplify right side
    14,002.80x = 149,083,587.07
  5. Step 5: Solve for x
    x = 149,083,587.07/14,002.80
  6. Step 6: Final answer
    x = 10,646.70

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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.