Finding the Fourth Proportional to 18,138,878.80, 27,237,809.40 and 13,125,374.80
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Solution
The fourth proportional to 18,138,878.80, 27,237,809.40 and 13,125,374.80 is: 19,709,402.17
Step by Step Solution
- Step 1: Write the proportion equation
18,138,878.80 : 27,237,809.40 = 13,125,374.80 : x - Step 2: Convert to fraction form
18,138,878.80/27,237,809.40 = 13,125,374.80/x - Step 3: Cross multiply
18,138,878.80x = 27,237,809.40 × 13,125,374.80 - Step 4: Simplify right side
18,138,878.80x = 357,506,457,105,963.12 - Step 5: Solve for x
x = 357,506,457,105,963.12/18,138,878.80 - Step 6: Final answer
x = 19,709,402.17
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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.