Home / 38,985.68-58,473-12,690.80

Finding the Fourth Proportional to 38,985.68, 58,473 and 12,690.80

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Solution

The fourth proportional to 38,985.68, 58,473 and 12,690.80 is: 19,034.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,985.68 : 58,473 = 12,690.80 : x
  2. Step 2: Convert to fraction form
    38,985.68/58,473 = 12,690.80/x
  3. Step 3: Cross multiply
    38,985.68x = 58,473 × 12,690.80
  4. Step 4: Simplify right side
    38,985.68x = 742,069,148.40
  5. Step 5: Solve for x
    x = 742,069,148.40/38,985.68
  6. Step 6: Final answer
    x = 19,034.40

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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.