Home / 15,420.12-21,280.05-9,051.27

Finding the Fourth Proportional to 15,420.12, 21,280.05 and 9,051.27

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Solution

The fourth proportional to 15,420.12, 21,280.05 and 9,051.27 is: 12,490.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.12 : 21,280.05 = 9,051.27 : x
  2. Step 2: Convert to fraction form
    15,420.12/21,280.05 = 9,051.27/x
  3. Step 3: Cross multiply
    15,420.12x = 21,280.05 × 9,051.27
  4. Step 4: Simplify right side
    15,420.12x = 192,611,478.16
  5. Step 5: Solve for x
    x = 192,611,478.16/15,420.12
  6. Step 6: Final answer
    x = 12,490.92

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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.