Home / 12,430.80-17,153.28-7,124.40

Finding the Fourth Proportional to 12,430.80, 17,153.28 and 7,124.40

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Solution

The fourth proportional to 12,430.80, 17,153.28 and 7,124.40 is: 9,830.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,430.80 : 17,153.28 = 7,124.40 : x
  2. Step 2: Convert to fraction form
    12,430.80/17,153.28 = 7,124.40/x
  3. Step 3: Cross multiply
    12,430.80x = 17,153.28 × 7,124.40
  4. Step 4: Simplify right side
    12,430.80x = 122,206,828.03
  5. Step 5: Solve for x
    x = 122,206,828.03/12,430.80
  6. Step 6: Final answer
    x = 9,830.97

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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.