Home / 28,430.07-42,643.89-9,711.78

Finding the Fourth Proportional to 28,430.07, 42,643.89 and 9,711.78

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Solution

The fourth proportional to 28,430.07, 42,643.89 and 9,711.78 is: 14,567.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.07 : 42,643.89 = 9,711.78 : x
  2. Step 2: Convert to fraction form
    28,430.07/42,643.89 = 9,711.78/x
  3. Step 3: Cross multiply
    28,430.07x = 42,643.89 × 9,711.78
  4. Step 4: Simplify right side
    28,430.07x = 414,148,078.02
  5. Step 5: Solve for x
    x = 414,148,078.02/28,430.07
  6. Step 6: Final answer
    x = 14,567.25

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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.