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Finding the Fourth Proportional to 28,607.90, 42,913.87 and 12,810.47

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Solution

The fourth proportional to 28,607.90, 42,913.87 and 12,810.47 is: 19,216.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,607.90 : 42,913.87 = 12,810.47 : x
  2. Step 2: Convert to fraction form
    28,607.90/42,913.87 = 12,810.47/x
  3. Step 3: Cross multiply
    28,607.90x = 42,913.87 × 12,810.47
  4. Step 4: Simplify right side
    28,607.90x = 549,746,597.62
  5. Step 5: Solve for x
    x = 549,746,597.62/28,607.90
  6. Step 6: Final answer
    x = 19,216.60

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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.