Home / 28,068.05-38,740.40-18,509.65

Finding the Fourth Proportional to 28,068.05, 38,740.40 and 18,509.65

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Solution

The fourth proportional to 28,068.05, 38,740.40 and 18,509.65 is: 25,547.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,068.05 : 38,740.40 = 18,509.65 : x
  2. Step 2: Convert to fraction form
    28,068.05/38,740.40 = 18,509.65/x
  3. Step 3: Cross multiply
    28,068.05x = 38,740.40 × 18,509.65
  4. Step 4: Simplify right side
    28,068.05x = 717,071,244.86
  5. Step 5: Solve for x
    x = 717,071,244.86/28,068.05
  6. Step 6: Final answer
    x = 25,547.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.