Home / 15,421.86-21,280.88-9,047.80

Finding the Fourth Proportional to 15,421.86, 21,280.88 and 9,047.80

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Solution

The fourth proportional to 15,421.86, 21,280.88 and 9,047.80 is: 12,485.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.86 : 21,280.88 = 9,047.80 : x
  2. Step 2: Convert to fraction form
    15,421.86/21,280.88 = 9,047.80/x
  3. Step 3: Cross multiply
    15,421.86x = 21,280.88 × 9,047.80
  4. Step 4: Simplify right side
    15,421.86x = 192,545,146.06
  5. Step 5: Solve for x
    x = 192,545,146.06/15,421.86
  6. Step 6: Final answer
    x = 12,485.21

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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.