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Finding the Fourth Proportional to 30,368.40, 45,552.60 and 28,521.60

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Solution

The fourth proportional to 30,368.40, 45,552.60 and 28,521.60 is: 42,782.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,368.40 : 45,552.60 = 28,521.60 : x
  2. Step 2: Convert to fraction form
    30,368.40/45,552.60 = 28,521.60/x
  3. Step 3: Cross multiply
    30,368.40x = 45,552.60 × 28,521.60
  4. Step 4: Simplify right side
    30,368.40x = 1,299,233,036.16
  5. Step 5: Solve for x
    x = 1,299,233,036.16/30,368.40
  6. Step 6: Final answer
    x = 42,782.40

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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.