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Finding the Fourth Proportional to 28,020, 42,030.24 and 7,242.24

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Solution

The fourth proportional to 28,020, 42,030.24 and 7,242.24 is: 10,863.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,020 : 42,030.24 = 7,242.24 : x
  2. Step 2: Convert to fraction form
    28,020/42,030.24 = 7,242.24/x
  3. Step 3: Cross multiply
    28,020x = 42,030.24 × 7,242.24
  4. Step 4: Simplify right side
    28,020x = 304,393,085.34
  5. Step 5: Solve for x
    x = 304,393,085.34/28,020
  6. Step 6: Final answer
    x = 10,863.42

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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.