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Finding the Fourth Proportional to 28,368.60, 42,559.80 and 8,647.53

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Solution

The fourth proportional to 28,368.60, 42,559.80 and 8,647.53 is: 12,973.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,368.60 : 42,559.80 = 8,647.53 : x
  2. Step 2: Convert to fraction form
    28,368.60/42,559.80 = 8,647.53/x
  3. Step 3: Cross multiply
    28,368.60x = 42,559.80 × 8,647.53
  4. Step 4: Simplify right side
    28,368.60x = 368,037,147.29
  5. Step 5: Solve for x
    x = 368,037,147.29/28,368.60
  6. Step 6: Final answer
    x = 12,973.40

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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.