Home / 42,746.13-64,140.26-20,578.05

Finding the Fourth Proportional to 42,746.13, 64,140.26 and 20,578.05

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Solution

The fourth proportional to 42,746.13, 64,140.26 and 20,578.05 is: 30,877.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,746.13 : 64,140.26 = 20,578.05 : x
  2. Step 2: Convert to fraction form
    42,746.13/64,140.26 = 20,578.05/x
  3. Step 3: Cross multiply
    42,746.13x = 64,140.26 × 20,578.05
  4. Step 4: Simplify right side
    42,746.13x = 1,319,881,374.40
  5. Step 5: Solve for x
    x = 1,319,881,374.40/42,746.13
  6. Step 6: Final answer
    x = 30,877.21

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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.